Reefer 350 System (73 Gal) - Red Sea

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  • Reefer 350 Complete System (73 Gal) - Red Sea
  • Reefer 350 Complete System (73 Gal) - Red Sea
  • Reefer 350 Complete System (73 Gal) - Red Sea
  • Reefer 350 Complete System (73 Gal) - Red Sea
  • Reefer 350 Complete System (73 Gal) - Red Sea
  • Reefer 350 Complete System (73 Gal) - Red Sea
  • Reefer 350 Complete System (73 Gal) - Red Sea
  • Reefer 350 Complete System (73 Gal) - Red Sea

Quick Overview

Red Sea Aquarium orders placed after 5/25 will ship on 6/9

Red Sea Reefer XL Tanks are drop ship items only. Due to their size, we are unable to have them on hand in our warehouse.

Drop Ship tanks can only ship to the 48 state contiguous USA.

Return pump not included - We suggest either the Sicce Syncra Silent or the Ecotech Vectra pumps.

  • Quick Overview

Red Sea Aquarium orders placed after 5/25 will ship on 6/9

Red Sea Reefer XL Tanks are drop ship items only. Due to their size, we are unable to have them on hand in our warehouse.

Drop Ship tanks can only ship to the 48 state contiguous USA.

Return pump not included - We suggest either the Sicce Syncra Silent or the Ecotech Vectra pumps.

Reefer 350 System (73 Gal) - Red Sea

86% Recommend this to a friend (6 of 7)

Drop-ships from manufacturer.

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Reefer 350 System - Black
SKU: 209575
Preferred Reefers earn 8,245 points
Reefer 350 System - White
SKU: 209576
Preferred Reefers earn 8,745 points

Availability: In stock


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Product Questions

I want to place a chiller in the space on the right side of the cabinet. What are the dimensions so I can plan the chiller size?
Question by: patrick on Jul 18, 2016 3:15:00 PM
Hi Patrick,
The internal dimensions of the REEFER 350 chiller area are as follows, 15.5" L x 18" W x 29.75" T.
Thanks for the question and if you have any others just let us know.
Answer by: Charlie (Admin) on Jul 19, 2016 8:15:00 AM
Hi what is it that this aquarium does not include. Like what do I need to purchase sepratley
Question by: Jack on May 20, 2017 6:53:00 PM
Hey there,
The Red Sea Reefer systems provide the tank, cabinet, sump, and necessary plumbing (including filter sock holder), but they leave the options on equipment choices to you. Lights, return pump, heater, skimmer, powerheads, etc, will need to be selected and purchased separately. They now also have the Deluxe version which does include the AI Hydra 26 lights and Red Sea mounting system if you would like a high end LED option included.

Have a great day!
Answer by: Zack (Admin) on May 22, 2017 6:53:00 PM
What led light would you recommend for this tank that would work to grow a mixture of different coral?
Question by: MIGUEL VILLALOBOS on Dec 30, 2016 10:47:00 PM
Great question! For proper lighting spread and effective PAR on a mixed reef Reefer 350, I would recommend two AI Hydra 52 HD LEDs. They will be more than capable of covering the 46" tank as well as providing enough PAR for those high demand SPS type corals. :-)

Answer by: Randy (Admin) on Jan 10, 2017 2:25:00 PM
What are the dimensions are the filter socks? Can i use the BRS brand filter socks, or do I have to buy them from Red Sea? I don't know if they are not standard because on of the reviews says they aren't. If they aren't standard, where can I purchase the filter socks?
Question by: Mitch on Jan 20, 2016 3:03:00 PM
Great question,
The BRS filter socks will fit in a 4" diameter hole. They do not work with the Reefer tanks due to the ATO compartment. You will need to currently purchase the socks from Red Sea directly. Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Jan 27, 2016 7:18:00 PM
What are the internal cabinet dimensions on the Red Sea reefer 350?
I am thinking of using a different sump
Question by: James on Mar 13, 2016 6:57:00 PM
Great question!
The Inside dimensions of the stand are 16.5" x 42". Feel free to let us know if you have any further questions!
Answer by: Connor (Admin) on Mar 15, 2016 10:47:00 AM

Full Details

Red Sea Drop Ship Information


Innovative Designs

Going from the top of the Reefer system down to the bottom, the first thing you will notice is the crystal clear glass and elegant beveled edges. The second thing you may or may not notice is the slim overflow that houses all the drain and return plumbing to keep the water a constant level within the display tank and surface skimming while being super quiet and taking up a very small amount of real estate inside of the tank. The return nozzle is fully adjustable for to direct the flow where you need it, and the dual drain system keeps overflows from happening like a single drain design may encounter. The dual drain design has one main drain that includes a diaphragm valve for easy tuning and adjustments. The other drain is completely open to flow directly down into the sump in the event that the main drain gets clogged. If plumbing is one of the reasons why you have never wanted to install a tank with a sump don’t worry as Red Sea has done all the planning for you and there is no gluing needed to assemble and seal all the plumbing.



The sump includes a filter sock holder and sock to keep large pieces of debris and detritus from clogging pumps and other pieces of equipment. The water can then flow from the filter sock into the skimmer compartment where the water will keep a steady level to aid in the best performance in your choice of skimmer or any other filtration components that you choose to include can be placed there. The water will then flow through the final bubble trap and into the final chamber where the return pump (not included) can be placed to pump water back through the Reefer tanks return plumbing.


Integrated Top Off

When water starts to evaporate all Reefer systems include an integrated top off system and reservoir that can hold a few days worth of top off water to keep the water level, salinity and flow rates consistent throughout the tank.


  Specification NANO 170 250 350 450
Main Features Ultra clear front and side glass ✔ ✔ ✔ ✔ ✔
Ultra clear front glass thickness (mm) 8 (3/10”) 10 (3/8”) 12 (1/2”) 12 (1/2”) 15 (5/8”)
Built in surface skimmer ✔ ✔ ✔ ✔ ✔
Integrated automatic top up system ✔ ✔ ✔ ✔ ✔
System Volumes Display tank water volume (L) 77 (21 gal) 130 (34 gal) 204 (54 gal) 275 (73 gal) 350 (92 gal)
In cabinet sump water volume (L) 28 (7 gal) 35 (9 gal) 40 (11 gal) 70 (18 gal) 90 (24 gal)
Total system water volume (L) 105 (28 gal) 165 (43 gal) 244 (65 gal) 345 (91 gal) 440 (116 gal)
RO reservoir volume (L) 4.5 (1.2 gal) 5.4 (1.5 gal) 8 (2.1 gal) 10.5 (2.8 gal) 13.7 (3.6 gal)
System Dimensions Display tank length (cm) 45 (18″) 60 (24.5″) 90 (35.5″) 120 (47″) 150 (59″)
Display tank height (cm) 45 (18″) 50 (20″) 53 (21″) 53 (21″) 55 (22″)
Display tank width (cm) 45 (18″) 50 (20″) 50 (20″) 50 (20″) 50 (20″)
Total system height with cabinet (cm) 132 (52″) 137 (54″) 140 (55″) 140 (55″) 142 (56″)
Sump Dimensions Water height (cm) 20 (8”) 20 (8”) 20 (8”) 24 (9.4”) 24 (9.4”)
Skimmer chamber (cm) 24 x 21 (9.4”x8.3”) 30 x 25 (11.8”x9.8”) 35 x 25 (13.8”x9.8”) 42 x 34 (16.5”x13.4”) 42 x 48 (16.5”x19”)
Pump chamber (cm) 24 x 12 (9.4”x4.7”) 30 x 12 (11.8”x4.7”) 35 x 12 (13.8”x4.7”) 42 x 15 (16.5”x6”) 42 x 15 (16.5”x6”)
Return Pump 3/4” threaded hose barb – Pipe Int. Dia 16mm (5/8”) 16mm (5/8”) 16mm (5/8”) 16mm (5/8”) 25mm (1”)
Recommended flow (lph)
(pump not included)
(530 gph)
(530 gph)
(660 gph)
(790 gph)
(1060 gph


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7 Items

  • Overall a great system By Jared on 4/29/2017

    Giving 4 starts because it is a great system if you're upgrading or getting in to the hobby however there are some small draw backs.

    I that you can get it and have it all plumbed and all you need a return pump to have it running.

    -Good build quality
    -Clear glass
    -Plumbing included
    -Nice stand

    -Size of ATO reservoir (I use a 5 gallon bucket in the right hand compartment to top off the ATO reservoir. This gives me ~8-10 gallons before refill.
    -Lack of built in refugium compartment. I've seen people convert the ATO tank to a fuge, but I've gone with a method of buying a baffle that turns a portion into a fuge (extra $120 after shipping)
  • Great tank, with minor flaws By Martin on 7/29/2016

    This tank is very well put together. I was looking for a larger tank from my 30 gallon JBJ, and this looked like a nice upgrade. The tank is just simply stunning, well put together with a lot of attention to detail all around. There is really two things I did not like about the tank. The auto-top-off is way to small for a tank this size, and i quickly replaced it with something more suitable, and use the small tank for storage. Also the sump does not really have much space depending on your setup, however I did find it was a glaring issue. While BRS is not responsible for the shipping it did make it to my house quickly. Word of warning this is a heavy tank, and the stand weighs a ton.
  • Minor annoyances By peter on 6/20/2016

    Overall it is a great tank.

    I love the look of the stand but if you don't like it then keep looking

    The low iron glass makes it look extra clear. The included sump is also glass and the built in ATO is nice.

    All the plumbing is included, just add a pump and screw it together.

    Now the little things I don't like about it. The ATO tank is too small. It's summer and humid but I still have to fill it every other day. The cabinet has a wall at about 2/3 so the sump is smaller than I want. No real room for a refugium. It would be much easier to stick the electronic stuff next to the tank rather than play with water .

    It is metric. American plumbing does not easily match if you want to change anything. Perhaps most annoying is that only Red Sea filter socks, $10, fit.

    On the whole there were more "nice" surprises than 'bad' ones. The valve is great for tuning the overflow, the hardware for building the stand was nicer than Ikea, it looks good, and the ever popular more.
  • Meticulously Built Reef System By Bobaloo on 6/18/2016

    I've had my hands in saltwater since the early 1970's and I typically like to buy each component separately but when I started researching this system, it was one that I just had to have. This aquarium by far looks like it's a custom built one. The glass looks like it was cut with a laser with no sharp edges and the fitting of the glass with the black silicone is meticulously applied.
    What's nice about this system is that it's a perfect BASE to start building your reef environment with, just start adding YOUR CHOICE of protein skimmer, return pump, etc. As for the stand, all I can say is that the exterior finish is seamless with no splits whatsover and is it solid! Even the sump is meticulously put together with the black silicone and it looks just as perfect as the aquarium itself. The bottomline is this. If you are looking for a SLEEK looking aquarium to house your own piece of the ocean, look no further then the Reefer Series line of aquariums from Red Sea.
  • Beautiful tank By Frank on 6/13/2016

    Coming from my RSM 250 (65gal), all I can say is wow!! Loved being able to keep all my own equipment, love the ultra clear glass. Tank is well built and designed, shipping was effortless. My only gripe was not knowing when the tank was shipped until I contacted BRS.
  • Great Alternative to DIY By Adam on 12/5/2015

    I bought this aquarium because it seemed like a great compromise between a DIY system and an all-in-one setup like the Nuvo series or something like Red Sea Max series where all the equipment is included.

    I was not disappointed. This is a great aquarium. It's build quality is sturdy and it's well designed, not to mention gorgeous to look at. Now for the specifics:

    Tank - Very thick glass for a 4 ft tank. Looks really sleek and modern in my living room. If you like a rimless tank you will not be disappointed. The overflow is very quiet once you get it dialed in, although I do notice some splashing noise from time to time when my wavemakers push a rush of water in its direction.

    Stand - Sleek and modern just like the tank. I went for the black one. Access to the sump is really good. If you run a chiller you'll like the built-in compartment with good ventilation in the back. However, I have LED lights and don't need a chiller. I kind of wish that they had made the chiller compartment smaller, which would have made room for a bigger sump. I ended up putting shelves in this space to store some of my aquarium gear, so it's not a total waste of space. I suppose you could also put reservoirs for two-part here as well.

    Sump - I kind of wish the sump could be bigger, but it seems well designed overall. There's enough space in the main chamber for a skimmer and a single BRS reactor. The sump fills the entire space, so you wouldn't be able to run any external equipment. I'd like to eventually get a fuge up and running but I'm not sure where I'd put it. The skimmer chamber has a constant depth of about 9.5". The return chamber is pretty small and runs at a nominal depth of 6".

    Now here is what I feel is the biggest pain point and the reason I'm giving 4 stars, not 5: The integrated ATO, while clever, has some MAJOR drawbacks. For starters, the reservoir holds only about 2.5 gallons of top-off water. It claims to hold 2.8, but only if you fill it all the way to the brim. This lasts about 48 hours for me, which means that I'm constantly refilling it. If I go on vacation I will need to rig a separate ATO to refill the tank while I'm gone. If the reservoir runs out your return pump will end up running dry pretty quickly. This is compounded by the fact that the return pump sits in just 6" of water to begin with. This means that it's nearly breaking the surface. There is no way to adjust the water level in the return chamber up or down because there is a built-in float-switch. I'm running Kalkwasser in the ATO. Over time (about a week) crystallized Kalk builds up in the float switch and blocks any more from dripping out, so even if my reservoir is full, sometimes the return chamber water level drops. I will probably replace the built-in ATO before long.

    The only other thing I would mention is that this is shipped from the warehouse by a freight company. Dealing with the freight company was kind of a PITA and I ended up having to rent a van and drive to the depot to pick it up. Don't expect it to show up on a UPS truck. They'll deliver it to your home, but you have to coordinate with the freight company and be home to receive the delivery.

    Bottom line:

    If you're looking for a sleek and modern reef tank that's also affordable, and you don't want to build a stand/sump and deal with plumbing everything, but still want to be able to choose your filtration equipment, this is the tank for you.

    On the other hand, if you are a DIY junkie you will likely be frustrated by your lack of options.

    That said, I'm in the first camp, and I am very satisfied with my purchase.
  • Almost perfect By harry on 10/15/2015

    I've had this tank for around two months. I love the tank and stand, the tank itself is built well... Like a TANK!!! Half inch glass on the front and is by far the heaviest three foot tank I've ever moved. It's also extremely quiet once you get the gate valve on the overflow dialed in(this will take a day or two) Now for the part I hate, the filter socks have to be bought from Red Sea, aftermarket socks just won't work. Also the design of the sump seems cool at first but will become a pain fast.