Under Gravel Filter

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    Universal Air Filter with low resistance refillable cartridge. 100% Plastic Design. This unit is most commonly used with ozone generators to hold desiccant DI Dryer Media however you can fill it with carbon or other medias to filter air as well. * 3/16 barbed fittings * 10 of tube *…

    $25.49 Regular Price: $29.99

    …Included? * Liberty 75 Filter Assembly * Carbon Sponge Filter * Passive Sponge Filter * Liberty 75 Lid * Liberty 75 Intake Assembly   Note: Eheim Liberty filter systems must be primed before powering on. Fill the filter chamber with aquarium water until…

    $25.49 Regular Price: $29.99

    …Liberty 130 Filter Assembly * Carbon Sponge Filter * Mechanical Sponge Filter * Passive Sponge Filter * Liberty 130 Lid * Liberty 130 Intake Assembly   Note: Eheim Liberty filter systems must be primed before powering on. Fill the filter chamber with…

    $29.74 Regular Price: $34.99

    …Included? * Liberty 200 Filter Assembly * 2x Carbon Sponge Filters * 2x Mechanical Sponge Filters * Liberty 200 Lid * Liberty 200 Intake Assembly   Note: Eheim Liberty filter systems must be primed before powering on. Fill the filter chamber with aquarium…

    $33.99 Regular Price: $39.99

    …ease of maintenance, HOB filters are a great option in these situations. They are easy to use and adaptable to a variety of aquarium conditions. The Tidal filters can be set up in seconds by hanging them right on any open side of your aquarium.   HOB filters will add flow to your tank…

    $43.99 Regular Price: $

    The FM-2 RO Filter Monitor with Volumizer tracks up to five filter stages at once by time and volume. The monitor allows you to create filter change points at each stage at an individual point in the future or at a specific water volume. When the preset points are reached the FM-2 will alert you…

    $33.99 Regular Price: $39.99

    The CPR Sock-It Filter Sock Holder is a simple filter sock holder using a gasket and acrylic holder. Very simple and inexpensive way to add filtration to any of your 1" outlets such as overflows and skimmer outlets. Three models each sold with or without filter sock: * 4”- 1…

    $29.74 Regular Price: $34.99
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    The CPR Sock-It Filter Sock Holder is a simple filter sock holder using a gasket and acrylic holder. Very simple and inexpensive way to add filtration to any of your 1" outlets such as overflows and skimmer outlets. Three models each sold with or without filter sock: 4- 1…

    $26.99 Regular Price: $31.99
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    …a filter system for them can be troublesome. The JBJ Bio Filter is perfect for rimless aquariums up to 30 gallons that are a minimum of 10.5" high. The internal 3 stage filtration includes a built in overflow that will help skim the top of your tanks water column and then into the filter cartridge.…

    $25.49 Regular Price: $29.99

    …for pH or temp probes. The Comline filters will efficiently remove surface scum, while the main chamber can accommodate filter floss or a small bag of chemical media such as activated carbon. The patented magenetic mounts will securely hold the filter on the side of the tank while the silicone…

    $45.89 Regular Price: $53.99

    …today that use industry standard 10” filters. * GE ROSave.Z 1 Micron Depth Filter * (2) BRS Universal 1 Micron Carbon Block Filter * 1.25 lb. Color Changing DI Resin Refill   The 5 Stage RO/DI Replacement Filter Kit has been upgraded with the latest in…

    $44.19 Regular Price: $51.99
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    …a 100% pure polypropylene depth filter with exceptional dirt-holding capacity. Purtrex true-graded density filter matrix (lower density at the surface of the filter with progressively higher density toward the center) captures particles throughout the entire filter depth. This translates to longer…

    $26.34 Regular Price: $30.99
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    …with most other RO/DI systems that use 10" canisters.   Our filter kits feature some of the most widely used and trusted brands in the world including GE, KX Technologies, and Pentek. The 10” filter size is the industry standard and will fit our systems as well as virtually…

    $30.59 Regular Price: $35.99
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    filters when they become visually dirty or there is a noticeable drop in pressure. Change carbon blocks every 6-12 months depending on use. This kit does not include a membrane filter as they need replacement every three years or so, depending on water and set up.   Our filter kits…

    $38.24 Regular Price: $44.99
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    Filter * BRS Chlorine & VOC 5 Micron Carbon Block Filter * BRS Universal 1 Micron Carbon Block Filter   Recommended Installation * Stage One - Purtrex 5 Micron Sediment Filter * Stage Two - BRS Chlorine & VOC 5 Micron Carbon Block Filter * Last…

    $25.49 Regular Price: $29.99
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    …includes: * Purtrex 5 Micron Sediment Filter * BRS Chlorine & VOC 5 Micron Carbon Block Filter * BRS Universal 1 Micron Carbon Block Filter * Omnipure Inline Carbon Block   We recommend changing sediment filters when they become visually dirty or there is…

    $39.09 Regular Price: $45.99
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    …5 Micron Sediment Filter * BRS Chlorine & VOC 5 Micron Carbon Block Filter * BRS Universal 1 Micron Carbon Block Filter * Omnipure Inline Carbon Block * 1.25 lbs DI Resin - Color Changing   We recommend changing sediment filters when they become visually…

    $46.74 Regular Price: $54.99
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    filters when they become visually dirty or there is a noticeable drop in pressure. Change carbon blocks every 6-12 months depending on use. This kit does not include a membrane filter as they need replacement every three years or so, depending on water and set up.   Our filter kits…

    $46.74 Regular Price: $54.99
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    …BRS 5 Stage Drinking & Reef PLUS RO/DI System   Our filter kits feature some of the most widely used and trusted brands in the world Including GE, KX Technologies, Pentek and Omnipure. The 10” filter size is the industry standard and will fit our systems as well as virtually…

    $40.79 Regular Price: $47.99
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    …most other RO/DI systems that use 10" canisters.   Our filter kits feature some of the most widely used and trusted brands in the world Including GE, KX Technologies, Pentek and Omnipure. The 10” filter size is the industry standard and will fit our systems as well as virtually…

    $32.29 Regular Price: $37.99
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    …and nitrites from your aquarium. Some systems will also see a decrease in nitrates. MarinePure will work in sumps, trickle filters, wet/dry filters, hang on the back filters or directly in the tank. * 100% Tank Tested * Most technically advanced bio-filtration substrate * High…

    $42.49 Regular Price: $49.99

    …Depth Sediment Filters Sediment filters are the first stage of filtration for any reverse osmosis or home filtration system, and traditional sediment filters are surface filters at best and can clog quickly, causing pressure drops. Aquatrex Depth Sediment Filters use a unique dual-graded…

    $33.99 Regular Price: $39.99
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    …By changing the color of the filter you can trick your phone to not overcompensate for it, especially if you use the auto mode on the camera. Depending on your light source, you will want to use the 15K filter for the day-time shots, and the 20K filter under deep-blue or actinic lighting.…

    $26.99 Regular Price: $29.99

    …submersible to 3 Ft. * Super fine mesh cartridge traps waste particles and snaps out easily for cleaning * Not recommended for fine sand and gravel   Specifications * Eheim Model Number: 3531090 * Battery Life: 4 Hours   EHEIM QUICK VAC…

    $41.64 Regular Price: $48.99

    …will allow you to store about 3 gallons of filtered water after your Reverse Osmosis system. Most people do not want to wait for their RO system to make on demand water when filling up a glass for drinking. A Pressure tank will store the filtered water under pressure and allow it to come out at a…

    $42.49 Regular Price: $49.99

    …works with a variety of filter medias such as activated carbon, GFO, and biopellets. * Great for HOB applications * Includes ball valve * Works great with Phosban Media * Requires feed pump   The PhosBan 150 can be mounted under the aquarium or hung on the…

    $44.82 Regular Price: $52.73

    …to recreate what you would normally find on the floor of a coral reef. It is 100% natural and will give a beautiful natural white sand color under most aquarium lighting. The variable grain size of the Bahamas Sand contains small particles, creating a large amount of surface area for biological…

    $25.49 Regular Price: $29.99

    …changes your tank needs. Now when doing water changes there is no need for buckets, siphons, or mess with the Python No Spill Clean & Fill Gravel Cleaner. With just turning on your faucet, your household water pressure to pull water out of aquariums through a venturi effect.   …

    $33.99 Regular Price: $39.99
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    …A TDS meter can not only provide peace of mind in monitoring your final product water, but it can also clue you in to when it's time to replace filter media. The Titanium S2 model features two remote TDS probes and cords, along with a magnetic display that makes for easy installation on the metal…

    $30.59 Regular Price: $33.99

    …A TDS meter can not only provide peace of mind in monitoring your final product water, but it can also clue you in to when it's time to replace filter media. The Titanium S3 model features three remote TDS probes and cords, along with a magnetic display that makes for easy installation on the metal…

    $40.49 Regular Price: $44.99

    Replacement Filter Fleece for the ClariSea SK-5000XL Automatic Filter Systems Keep your ClariSea filter system running perfectly with the 20-micron replacement fleece rolls. Each roll is 131 feet long and can give you months of maintenance-free operation.   Specifications: …

    $34.00 Regular Price: $

    …we are finding that a key factor to bringing a dino outbreak back under control is providing enough of the right kind of microbial competition. Bacteria are a major source of competition for dinoflagellates, but under normal circumstances we tend to heavily limit them through low nutrients…

    $28.89 Regular Price: $33.99
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    …we are finding that a key factor to bringing a dino outbreak back under control is providing enough of the right kind of microbial competition. Bacteria are a major source of competition for dinoflagellates, but under normal circumstances we tend to heavily limit them through low nutrients…

    $46.74 Regular Price: $54.99
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    …Systems * Dishwashers * Coffee Makers * Refrigerators * Water Coolers * Icemakers * Toilets * Beverage Stations * Under Sinks * Water Heaters * Clothes Washers * Hotels, Apartments, Multi-Story   Specifications: Input Connection -…

    $45.05 Regular Price: $53.00

    …packed Rollermat Elevation Stand assembles in seconds and will raise your Theiling Rollermat by approxametly 6 inches. * Fits directly under rollermat * Can be placed internally or externally * Lifts Rollermat by 6 inches   The acrylic stand will let you place…

    $28.89 Regular Price: $33.99

    Low Profile for placing under carpet or in tight spaces. Be notified if there is ever a leak before it turns into a disaster. Connecting the LD-1 Leak Detector to the FMM module will allow your Apex Controller to notify you if water ever touches the sensor. There are many applications for leak…

    $25.46 Regular Price: $29.95

    …All-In-One Polarized V2 Filter Lens * Perfect for filtering out glare from glass * Sharp detail * Stack behind 15K & 20K lens   What's Included? 1x Lens Holder Clip 1x All In One Polarized V2 Filter Lens 1x Orange 15K Filter Lens 1x Cleaning Cloth …

    $29.71 Regular Price: $34.95

    …off automatically by picking up how much available light is being picked up by the sensor. When the light is on the pumps will ramp up to follow the max settings on the controller. The photo sensor should be placed directly under your tanks lights and will follow the photo period of your light.

    $29.32 Regular Price: $34.49

    …pore size * 45m (135 ft) long   No more cleaning or changing filter socks every few days. A single roll can take the place of over 50 filter sock changes and if you do not wash your filter socks can save a lot of money in the long run. We have had a Rollermat running on a…

    $28.89 Regular Price: $33.99

    …around the stand, sump, and tank. Low-profile probe to be used in conjunction with the Advanced Leak Detection Module: ALD from Neptune Systems. * Easily slips under carpet * Low-profile design to easily hide away * Plugs into the ALD with a modular RJ11 connection

    $26.96 Regular Price: $29.95

    …used. Dimensions:19.5" x 24" x 1.5"   The Aquamesh progressive filter pads are great for pre-filtration in sumps. They have a very rigid design that will not collapse like traditional filter floss. The Progressive pads come in 4 different densities that can be ran in succession…

    $26.34 Regular Price: $30.99

    …used. Dimensions:19.5" x 24" x 1.5"   The Aquamesh progressive filter pads are great for pre-filtration in sumps. They have a very rigid design that will not collapse like traditional filter floss. The Progressive pads come in 4 different densities that can be ran in succession…

    $27.19 Regular Price: $31.99

    …quickly. Dimensions:19.5" x 24" x 1.5"   The Aquamesh progressive filter pads are great for pre-filtration in sumps. They have a very rigid design that will not collapse like traditional filter floss. The Progressive pads come in 4 different densities that can be ran in…

    $25.49 Regular Price: $29.99

    …of corals and filter feeders. Component B is a balanced mixture of heavy metals that will help accelerate the growth and coloration of corals and filter feeders. Component C is a balanced mixture of iodine and fluorine that will help accelerate the growth and vitality of corals and filter

    $26.09 Regular Price: $28.99

    …other outbreaks. The drop-in design works with all Nuvo Fusion Desktop and Concept all-in-one aquariums. Taking the place of the filter sock, the included mechanical filter sponge will help remove large particles, keeping the UV lamp clean, and the whole assembly only takes a couple minutes to have…

    $44.99 Regular Price: $49.99

    …Perfect for acclimation * Reduces hard shadows * Reduces light scatter * Softens source of light * Easy magnetic install * Under 10% loss of overall light   Two Models Available * Slight Diffusion Optic Kit - Best for deeper tanks with minimal…

    $40.50 Regular Price: $45.00
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    …Perfect for acclimation * Reduces hard shadows * Reduces light scatter * Softens source of light * Easy magnetic install * Under 15% loss of overall light   Two Models Available * Major Diffusion Optic Kit - Best for acclimation, or shallow tanks…

    $40.50 Regular Price: $45.00
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    High quality, Economical, American-made pH probe to meet your saltwater aquarium needs. * Made in the US under strict quality control * BNC connector with superior insulators * Cable has low noise design with conductive copper layer between braid and center conductor * Less…

    $29.74 Regular Price: $34.99

    High quality, Economical, American-made ORP probe to meet your saltwater monitoring. * Made in the US under strict quality control * BNC connector with superior insulators * Cable has low noise design with conductive copper layer between braid and center conductor * Less…

    $42.49 Regular Price: $49.99

    …  Features: * Reduced Shadowing * Compatible with A Series & H Series Kessil LED Lights * Installs in under a minute * 360° Adjustability   Specifications: * Dimensions: 1.12" x 2.09" * For use with: A-Series…

    $27.00 Regular Price: $30.00

    …allows for easy storage * Dimensions: 7.9" x 5.65" x 1.1"   OXO has been producing quality kitchen equipment since 1990 under the philosophy of Universal Design or products usable by as many people as possible. The result is quality products with comfortable grips, no-slip…

    $25.49 Regular Price: $29.99
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    …color card and compare it to the surrounding color fields. To do this, look into the open cuvette from above. * Read off the measured pH value under the relevant color field. * Rinse out the glass cuvette and the syringe thoroughly with tap water after the measurement process. …

    $46.19 Regular Price: $51.32

    …  A traditional aquarium will come with a plastic trim to reinforce the glass on the top and bottom rim. Smaller tanks under 3 feet and under traditionally do not have any center braces even if there is trim on the tank which keeps things pretty simple which selecting a screen…

    $32.29 Regular Price: $37.99
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    …  A traditional aquarium will come with a plastic trim to reinforce the glass on the top and bottom rim. Smaller tanks under 3 feet and under traditionally do not have any center braces even if there is trim on the tank which keeps things pretty simple which selecting a screen…

    $32.29 Regular Price: $37.99
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    …time delay * When taking maintenance of a skimmer or other electric equipment, please remove the plug from the socket first. * Must be used under the maximum power   When power is lost to a system with a sump the water level in the sump will almost always rise up a few…

    $40.49 Regular Price: $44.99

    High quality Neoprene Foam is perfect for placing under rimless tanks.  Rimless tanks rest directly on the top of the stand, which may be a rougher surface than glass or acrylic can handle in most cases.  By placing a single sheet of Neoprene Foam in-between the tanks glass/acrylic and…

    $28.04 Regular Price: $32.99
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    …Guarantee * Driven by a permanent magnet type synchronous motor * Adjustable flow rate * Stainless steel shaft * Interchangeable sponge filter * Applications: aquariums, terrariums, internal or external fountains, landscaping construction and for any application which requires…

    $25.49 Regular Price: $29.99

    …but unattractive, dust throughout the system. Canister filtration: Load Xport-PO4 into filter cartridge as directed by filter manufacturer. Passive filtration: Place Xport-PO4 loosely in an 800µm mesh filter bag and locate in an area of low- to medium-flow. Media reactors: If placing Xport-PO4…

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    …at room temperature. Remove Xport-BIO from bucket and pour water into the aquarium system, then place Xport-BIO into canister filter, media reactor, or 800m mesh filter bag; a flow-through rate of 1 - 3x the total aquarium volume per hour is recommended. Do not fluidize. Remove and rinse ~33% of…

    $31.99 Regular Price: $39.99
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    …at room temperature. Remove Xport-NO3 from pail and pour water into the aquarium system, then place Xport-NO3 into canister filter, media reactor, or 800µm mesh filter bag; a flow-through rate of 1 - 3x the total aquarium volume per hour is recommended. Do not fluidize. In systems with an…

    $33.99 Regular Price: $42.49
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    …at room temperature. Remove Xport-NO3 from pail and pour water into the aquarium system, then place Xport-NO3 into canister filter, media reactor, or 800µm mesh filter bag; a flow-through rate of 1 - 3x the total aquarium volume per hour is recommended. Do not fluidize. In systems with an…

    $33.99 Regular Price: $42.49
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    …in between calibrations.   High quality, American-made pH probe to meet your saltwater aquarium needs. * Made in the US under strict quality control * Double junction designed specifically for contact with proteins or heavy metals * BNC connector with superior…

    $47.99 Regular Price: $59.99

    …and gas gauge.  At some point you will end up in trouble.  With RODI systems it is TDS that you will want to monitor for performance and filter quality.  By using a dual TDS meter it will allow you to see your TDS readings in two places.  We will usually suggest putting one probe…

    $25.49 Regular Price: $29.99

    …easy to use double O-Ring push connect fittings. * Easy to operate, clean and maintain. * High quality ball valve for precise tuning. * Filter wrench * (2) 3 Ft. sections of tubing * Instantly attaches to popular pumps using included push connect or threaded fittings. * 1/2"…

    $42.49 Regular Price: $49.99