Deluxe CPR Continuous Siphon Overflows

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Quick Overview

A built-in overflow is the most efficient method of draining aquarium water to a filter. If your aquarium does not have built-in overflow, CPR Continuous Siphon Overflows/Prefilters are the best means for getting water from an aquarium to a filter system. They quietly skim up to six times more water than units with tubes.


The advantages of CPR Continuous Siphon Overflows/Prefilters include:


  • Adjustable water level allows you to easily change the level in your tank

  • Black top reduces algae growth

  • Plastic screen to prevent fish loss

  • Quiet operation: All units except the CS150 come with slip screen, sponge and vent tube to help reduce noise.

All Units come with the Aqualifter Pump and acrylic lid for quieter operation.


Selecting the Correct CPR Overflow

More
  • Quick Overview

A built-in overflow is the most efficient method of draining aquarium water to a filter. If your aquarium does not have built-in overflow, CPR Continuous Siphon Overflows/Prefilters are the best means for getting water from an aquarium to a filter system. They quietly skim up to six times more water than units with tubes.

The advantages of CPR Continuous Siphon Overflows/Prefilters include:

  • Adjustable water level allows you to easily change the level in your tank
  • Black top reduces algae growth
  • Plastic screen to prevent fish loss
  • Quiet operation: All units except the CS150 come with slip screen, sponge and vent tube to help reduce noise.

All Units come with the Aqualifter Pump and acrylic lid for quieter operation.

Selecting the Correct CPR Overflow More

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Deluxe CPR Continuous Siphon Overflows

95% Recommend this to a friend (36 of 38)

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Deluxe CS50 with Lid and Aqua Lifter
SKU: 206560

reg. $109.99

Special Price: $98.99

 
 
Deluxe CS90 with Lid and Aqua Lifter
SKU: 206561

reg. $119.99

Special Price: $107.99

 
 
Deluxe CS100 with Lid and Aqua Lifter
SKU: 206562

reg. $129.99

Special Price: $116.99

 
 
Deluxe CS102 with Lid and Aqua Lifter
SKU: 206563

reg. $139.99

Special Price: $125.99

 
 
Deluxe CS150 with Lid and Aqua Lifter
SKU: 206564

reg. $149.99

Special Price: $134.99

 

Availability: In stock

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Product Questions

Can I somehow restrict the flow on the CS50 to 250gph?
Question by: Owen on Dec 2, 2013 12:23:00 PM
Hi Owen,
You wouldn't want to restrict the flow on the overflow itself otherwise you run the risk of an overflow if something impedes it further (snail, algae, etc) but you can restrict the output of your return pump to 250gph. If 250gph is all that is pumping up the tank, then 250gph is all that will drain via the overflow. Its basically self replicating (up to the max size of the overflow) because it only drains the water that "overflows" into the overflow system.
Answer by: Bulk Reef Supply on Dec 2, 2013 12:23:00 PM
Can I buy this without the pump? I already have that pump.
Question by: James on May 21, 2016 5:30:00 PM
Great question! Unfortunately not, all of the CPR continuous siphon overflows have the aqualifter included.
Answer by: Carter (Admin) on May 24, 2016 2:42:00 PM
how big should this box be for 125 gal tank
Question by: john on Apr 20, 2014 7:30:00 AM
Hi John,
The overlow box just has to be large enough to accomidate the flow from your return pump. Without knowing how big your pump is I can't say for sure, but assuming its in the ballpark of 1200gph like most return pumps on a tank that size would be, the CS102 should do the job.
Answer by: Bulk Reef Supply on Apr 20, 2014 7:30:00 AM
Will this fit over a standard rimmed aquarium? How wide can the rim be?
Question by: Erik on Apr 14, 2016 8:18:00 PM
Great question!
These will work on rimmed aquariums with a rim up to 2" wide. Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Apr 19, 2016 3:17:00 PM
Perhaps a silly question but, now that I have my sump with CPR overflow up and running, how do I keep my floating fish food pellets(Spectrum) from being sucked into th overflow?
Thanks, Shane
Question by: Shane on Mar 10, 2014 8:10:00 AM
Hi Shane,
Its a good question and one that everyone with a sump faces. The most common solution is to turn off the return pump while you feed. Almost every controller on the market has a standby or feed option which allows you to turn them off on a temporary timer so if you have a controller that is the best route to go. Otherwise just pull the plug (just don't forget to plug it back in!).
Answer by: Bulk Reef Supply on Mar 10, 2014 8:10:00 AM
do I hook up lifter pump so it puts water in overflow or removes air?
Question by: ed on Sep 21, 2015 6:47:00 AM
Great question!
You will install the pump so it draws water out of the tank and places it in the back of the overflow section. No reason to draw air with the Tom Aqualifter. Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Sep 21, 2015 4:45:00 PM
Where would I get replacement foam pads for the overflow?
Question by: Alex Gerald Osborne on May 18, 2016 6:19:00 PM
Great question!
The replacement components may be available from the manufacturer directly.
http://www.cpraquaticinc.com/
Answer by: Connor (Admin) on May 18, 2016 6:25:00 PM
Does the Aqua-lifter pump run continuously or does it have some a sensor to know when air is in the system?
Question by: Brian on Jul 21, 2014 12:38:00 PM
Hi Brian,
The aqualifter runs continuously. Really there is no reason not too. There isn't a downside to running it and the last thing you want is for it to not run because of a malfunction from an extra sensor :)
Answer by: Bulk Reef Supply on Jul 21, 2014 12:38:00 PM
What size (or type) return pump would you recommend with this overflow? It would basically need to have about a 5' head height to reach from sump to tank. Thank you!
Question by: andrew on Dec 16, 2013 9:51:00 AM
Hey Andrew,
It depends on which of the overflows you are looking at. As a rule of thumb though you want your return pump to be in the ballpark of 10x the size of your tank. So around 500gph for a 50g tank for example. Then make sure that your overflow is rated for a flow higher then whatever that number is. You don't want a 300gph overflow with a 500gph pump as that extra 200gph has to go somewhere (and it will be on your floor!).
Answer by: Bulk Reef Supply on Dec 16, 2013 9:51:00 AM
In the event of a power failure when I'm not home, will the unit begin the siphon automatically when the power comes back on? Will there be any chance of overflowing my tank or system?
Question by: Debbie on Apr 30, 2014 5:46:00 AM
Hi Debbie,
The overflow is designed as such that the siphon is maintained in the event of a power outage. It won't "recreate" a siphon but it shouldn't lose a siphon to begin with.
Answer by: Bulk Reef Supply on Apr 30, 2014 5:46:00 AM

Full Details

DELUXE PACKAGE Includes:

  • CS Siphon Overflow box
  • Acrylic Lid
  • Aqua-Lifter Pump

CS50 Specifications:

  • Flow Rate: 300gph
  • Outflow Size: 3/4" Bulkhead
  • Width: 6"
  • Requires approximately 6" of clearance on outside of tank

Owners Manual

 


CS90 Specifications:

  • Flow Rate: 600gph
  • Outflow Size: 1" Bulkhead
  • Width: 7.25"

Owners Manual

 


CS100 Specifications:

  • Flow Rate: 800gph
  • Outflow Size: 1" Bulkhead
  • Width: 9 3/8"

Owners Manual

 


CS102 Specifications:

  • Flow Rate: 1,200gph
  • Outflow Size: 2 x 1" Bulkheads
  • Width: 9 3/8"

Owners Manual

 


CS150 Specifications:

  • Flow Rate: 1,600gph
  • Outflow Size: 1.5" Bulkhead
  • Width: 9 3/8"

Owners Manual

 

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Reviews

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  • Works great By KLMulder on 5/9/2016

    Quick and easy install on my 180Gal salt water tank. Trouble free operation. Lost power the day after getting the tank up and running, when the power came back on the pump removed the air from the overflow and had it working perfectly again before I had even checked on it. A+.
  • Using on planted tank By jcdelaroche on 4/24/2016

    Works great, quiet and of excellent build quality.
    it works great drawing the surface scum, keeps my water clean. I'm using it with an Aqueon pro flex model one and I'm overall very satisfied with this
    Product. I have used it for a few months, I use the aqualifter pump to removed trapped air.
  • Near silent with tweaks By Jason on 4/22/2016

    I purchased the CS102 because it has 2 1" drains. I didn't need the 1200 gph capacity, but wanted to set it up with a "modified" Bean Animal design for quieter operation. My 55 gallon tank is tempered, so drilling isn't an option and I can't afford to upgrade yet. Previously I had an Eshopps overflow with a single drain. This worked, but I could never make it quiet. Since the tank is in the living room, this was a constant annoyance. I decided to go with a Bean Animal type setup as best I could with a HOB overflow. I know I should have a third drain to be completely fail-safe like the true Bean Animal design, but I'm willing to take the risk for now. I made one drain a full siphon with 1" PVC elbows and made the height near the bottom of the drain box. The other drain, I extended so that it is just below the water height in the tank. I then used a gate valve to dial down the flow of the full-siphon drain so that the water level is just even with the open, drain. I have a controllable DC pump, so I was able to optimize the flow rate and match this with the drain rate to make it all completely silent. Now I only hear an occasional trickle as my Gyre pump causes a slight surge as it cycles on.
  • Great Product! By Joshua on 3/3/2016

    CS90 (600 gph) works very well, easy to install. Great build quality!! I have abandoned the filter foam on the bulkhead strainer because it clogs (shrimp shells) too easy and must be cleaned every 2 days. Seems to run quieter without it. I have it matched with a 714 gph return pump & it seems like it could take more flow. Great option if you don't want to drill your tank.
  • Very nice By Dimitri on 2/25/2016

    I will never be 100% OK knowing is not an internal overflow box. Any way this works fine it has never fail- a few times I had a power failure and everything started working right on time. I bought 2 I like it I do think is pricey but nothing is cheap in this freaking Hobby ha ha ha I will recommend it.
  • Super happy, nice piece of equipment! By Landon on 1/3/2016

    I was able to get it running quickly and I am very happy with the overall quality of the product. It runs quietly and is secured firmly to my rimmed 55 gallon tank. The small pump included is very quiet as well and I was able to splice it's input to also prime a water bridge I have on my sump!

    My only issue is that the priming air nozzle coming out of the top is very delicate and positioned vertically. I have my tube running down and I feared I might break it from snagging the tube at some point so I worked around this by using a short piece of tube up and then to a 90 degree irrigation elbow which led my tubing over and down to my sump, where I have the pump stashed. I also attached a zip tie anchor to the side of the overflow container and secured the tube to the side in order to prevent it from tugging the delicate nozzle. This seemed like a better connection and reduced the risk of it breaking off the nozzle which could lead to a serious issue! I also zip tied my tube onto the nozzle as a last precaution.

    Other than that, I am super happy with this purchase and it is running beautifully.
  • Good product By Jeff on 11/17/2015

    Does as advertised. Added an additional bulkhead and overflow to balance the overflow and to prevent the unit from pulling a siphon and making that annoying flushing sound.
  • Awesome By Bogey on 8/18/2015

    Works just like is says! Great shipping got it faster then they said! Will buy more stuff from them!!
  • Great product but beware of over flowing syphon By GP on 7/28/2015

    Do not get it with out the pump or you are increasing chances of syphon failure. Even with pump it may happen so invest in a new tank or get an apex controller with relay floats to control return pump in case of over flow.
  • Great Product By Luke on 7/11/2015

    Straight out of the box, it was quick and simple to install on the tank. I did not want to drill my tank and this fit the bill perfectly. I did do a little oversized on it to get better flow rates and additional protection, and this overflow delivers!
  • Overflow By Ty on 3/6/2015

    I was abit uneasy about hooking up a overflow to my 60gal (never worked with pvc before) But it was a breeze, and the CS90 has worked like a champ. Not loud at all and skims water great. Thanks to BRS for the great product!!
  • no Better service, no better product. Thanks BRS!!! By Trinnium on 2/26/2015

    If you need an over flow box, this is the one to get. If you’re not sure where or whom to perches it from, then someone has failed to direct you to BRS!!!. Amazing product!! Amazing service!!, that sums it all up. O yea!! I am real person like you, not someone that works for them or computer generated:). Just saying :).

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