Red Sea

Reefer 250 System (54 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. 


Drop-Ship Info Red Sea Drop Ship Information

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Product Questions

Would 1 XR30 cover this tank or would it be better to go with 2 XR15s?
Question by: Sawyer Wells on Apr 15, 2020, 12:51 AM
Hey there,

One of them would not be enough, you definitely would need two.

Take care
Answer by: Thomas Billington on Apr 16, 2020, 2:00 PM
Does this include the new and improved refugium ready sumps that Red Sea recently introduced?
Question by: Cooper on Nov 26, 2019, 2:21 PM
Hey there!

It will come with the latest sump that has the option for the refugium.

Take care
Answer by: Thomas Billington on Nov 26, 2019, 2:35 PM
I was planning on ordering one of these sometime later this month or in early February, but I noticed in the detail section it says that these aquariums will be shipped until January 12. Will I be able to order one after that date? Is the aquarium being discontinued? Thank you.
Question by: Chris on Jan 1, 2018, 11:30 PM
Thanks for reaching out to BRS!

This aquarium will still be available after 1/12. We're just waiting on more to be made. Have a great day!
Answer by: Josh Cuta on Jan 8, 2018, 5:34 PM
What size pvc do I need for plumbing?
Question by: Matt on Nov 24, 2017, 11:36 PM
The return plumbing fitting is 18mm and the drains are 25mm and 32mm.
Answer by: Charlie on Nov 25, 2017, 8:53 AM
Will the side glass on a Reefer250 accommodate a VorTech MP10wQD pump??? I cannot find the wall thickness for it in the specs. Thanks.
Question by: anthony on Jun 14, 2016, 12:02 AM
Great question!
The thickness of the 250 will be 1/2" and the MP10- is designed to work up to 3/8". The Mp10 is just a little too weak to fully seal to the unit. Feel free to let us know if you have any further questions.
Answer by: Connor on Jun 15, 2016, 2:14 PM
Hi, I notice that the Reefer 250 has a 16mm ID return hose. What is the best way to adapt that to a return pump, which typically has a 3/4" or possibly 1/2" discharge barb? Thanks!
Question by: LAN CARTER on May 11, 2016, 9:12 AM
Great question!
You can find a pump with an adapter which will work for 5/8" Often you can stretch the tubing from 5/8 up to 3/4" with some force and a little heat however considering a different pump that can accommodate varied tubing such as the Eheim will be a great option!
Answer by: Connor on May 11, 2016, 6:49 PM
do you get 1300 dollars worth of reward points?
Question by: alec on Mar 31, 2016, 8:24 PM
Great question!
If you are a member of the preferred reefer you can get 5 x rewards points with this purchase, or 6495 in rewards points. Feel free to let us know if you have any further questions!
Answer by: Connor on Apr 1, 2016, 3:36 PM