Red Sea

Reefer 350 System (73 Gal)

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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


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

Return Plumbing - 25mm

Main Drain - 32mm

Emergency Drain - 25mm


Note: All Red Sea Reefer Aquariums include a black interior finish, regardless of the exterior finish. 


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Product Questions

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 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 on May 22, 2017, 6:53 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 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 on Jan 10, 2017, 2:25 PM
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 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 on Jul 19, 2016, 8:15 AM
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 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 on Mar 15, 2016, 10:47 AM
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 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 on Jan 27, 2016, 7:18 PM