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Synergy Reef Systems

Shadow® Overflow Spacer Ring Kit

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from 123 reviews

CL-26 Aquarium Sump

Awesome sump ! The build and the delivery time was excellent. The Synergy CL-26 Sump fit perfectly underneath my stand with plenty of room to maneuver. Was able to fit a Simplicity DC320 Protein Skimmer with no issues, plenty of space ! Very pleased with this sump ! Thank you SYNERGY 🤘🏻🤘🏻🤘🏻

William Bain / UPS Store

Synergy Reef® CL-26 Aquarium Sump

01/04/2025

Convenient

Layers of glue is not best sealing approach but effective. All my flow goes thru the shortest with u installed for noise. 800 gallons an hour through filter sock others just drip into sump.

Tom Shaw

Internal Pre-Cut Pipe Kit

01/01/2025

63 mm Hole saw

Worked great nice clean cut!!

Customer

63mm Diamond Hole Saw

12/16/2024

Line Lock

I purchased the double kit for my 75 gallon system. They work great I have used them for years!!

Customer

Loc®Line Return

12/13/2024

Great over flow

I installed it on my 75 gallon tank. Works great so quiet once tuned in. Synergy provided get information from drilling holes to installing and adjusting. Super quite great product!!!

Customer

16″ Shadow® Overflow V3 2500 GPH

12/13/2024

Very impressive

Given its superior quality, customizable color options, and robust functionality, the Synergy Reef sump is highly recommended for a stylish and efficient filtration system.

Shaun Jones

Synergy Reef® SK-44 Clarisea SK5000 & Filter Sock Sump

12/06/2024

For large aquaria this is the only overflow that can handle high gph in a single unit.

Dominic Derome

16″ Shadow® Overflow V3 2500 GPH

11/25/2024

Very well crafted unit. High quality overflow

Dominic Derome

16″ Shadow® Overflow V3 2500 GPH

11/21/2024

Great Product

Works flawlessly for my 310gal aquariums. Only need one gate valve to fine tune the sound out of the drain. Quality product. Highly recommend.

SPReefs Seth Pope

16″ Shadow® Overflow V3 2500 GPH

10/14/2024

Great ATO container

I am very pleased with my ATO container. It holds a goodly amount of RO water.

STEVEN BENDER

15 Gallon ATO Containers (44-60-72 Series)

10/14/2024

Excellent Sump at Fair Price

So I ordered a RM 34 roller mat sump that needed to be cut down to a 32”. It came in about a month and it was shipped extremely well. It took me hour to bag up all the peanuts from packaging. :) It looks amazing and while I have not installed it yet (waiting on tank) I am certain it will perform just fine! My only thought is I wish the acrylic was a little thicker but overall very happy.

Chad Zenzen

Synergy Reef® RM-34 Red Sea ReefMat or Clarisea Sump (Rollermat)

10/10/2024

Quietest overflow system!

I've been using the overflow for over a year now and am really enjoying the very low noise the box is outputting altough I am running a lot of flow through it! Surface skimmer is perfect and cleaning is very easy. Great design!

Steeve Messier

16″ Shadow® Overflow V3 2500 GPH

09/16/2024

Good product

Good an consistent construction, easy to assemble. And thr dimensions from the website were accurate.

Jose De La Cruz

16″ Shadow® Overflow V3 2500 GPH

09/11/2024

Great overflow

I installed this over flow on my 240 Gallon (2 X 2 X 8) tsunami aquarium. I have it plumbed into my Synergy Reef CL-60. Everything runs great. My only regret is not getting the option to replace the filter socks with a roller mat. I had to cut my CL-60's filter sock section to accept my roller mat.

William Goff

16″ Shadow® Overflow V3 2500 GPH

08/30/2024

Very nice unit

Randy Holt

16″ Shadow® Overflow V3 2500 GPH

08/29/2024

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Shadow® Overflow Spacer Ring Kit

Shadow® Overflow Spacer Ring Kit

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