Synergy Reef CL-34 Sumps


**********These sumps are built to order.  Current lead time is 6 weeks  ******************

34″ x 15″ x 15″ Synergy Reef CL-34 Sump Color Laminated

    Reset options

    Choose your exterior side colors

    *For Storm Cloud color, please select "All Clear" 

    *Choose what Drains you need.

    *John Guest Fittings

    Please select how many John Guest fittings you would like installed. 

    *Filter Socks

    4" Filter Socks 100 Micron

    *Matching Sock Silencers

    Add a set of Matching color sock silencers

SKU: CL34Sump Category:


Are you looking for the perfect sump that not only looks awesome, but has over the top performance? The Synergy Reef® CL-34 model sumps are your answer. We have designed this model to meet the demands of the reefer who demands more than the average off the shelf sump. We hand build each one to meet your needs. Need slight modifications in length to be able to fit this in your stand. Want it to flow right to left or left to right? We can do that! Try that with an off the shelf sump. The CL Series™ sumps feature a double color Cross Laminated™ euro brace. We only use the highest quality cell cast acrylics on our sumps. Built by Reefers for Reefers!

Available in Left to Right or Right to Left Flow Configurations (Shown in Left to Right)


  • Standard – Clear Sides and Back ***** If you would like the sides and back the to be matching Color , please select “Color To Match” in the Exterior Wall Color Option above. For Storm Cloud choose “ALL CLEAR”.  Storm Cloud will have White sides/back with a Clear Smoked front. 
  • Dimensions: 34″ long x 15″ wide x 15″ high
  • Skimmer Section: 17.5″ x 14.5″
  • Return Pump Section: 6″ x 14.5″
  • Total Water Volume: 31 gallons
  • Skimmer Water Level: 6″ to 10″ adjustable
  • Removable media tray in between the baffles use for filter pads and bags of media
  • Laser etched water level markings to allow easy setup of skimmer water depth from 6.5″ to 9.5″
  • Cross Laminated™ color Euro-bracing
  • High Quality Precision Machined Poly carbonate lids over Filter Socks and Return Pump areas
  • High Quality machine rounded and chamfered edges
  • Advanced designed Euro-bracing also has cord routing and Dosing connections built in
  • 4 x 1/4″ John Guest tubing holders for plug n play dosing / ATO connection
  • Drain Input Fittings: 3 x 1.5″ ABS Bulkheads (Allows Plug n Play with the (Shadow Overflow System)
  • Filter Socks Holders: 2 x 4″
  • Return section has 1″ Bulkhead
  • Made In The USA!!

MSRP: $699.99



Additional information

Weight45 lbs
Dimensions41 × 21 × 21 in
Stainless Thumbscrews

No, Plastic is fine., Yes, Adjustable Baffle Only (Qty.2)

Heater Holders


Exterior Wall Color


Return Bulkhead Size

, ,

Sock Silencer (set)

No, Yes, I do want matching sock silencers

Customer Reviews

Based on 7 reviews
John Hammond

This is by far the sexiest thing I have seen. A++++
Will recommend to all my reef friends.

Mike Weckbacher

I received my sump, the quality is amazing. You can clearly see the time they take and their professionalism. A quality American made product. Customer service was also great, timely email responses, and notifications throughout the build.

Synergy Sumps Are Like No Other – Simply Flawless!

Purchasing my Synergy sump was the best decision I have made in all my years of fishkeeping. I could write a book about how wonderful the Synergy sump truly is, but I will save everyone the micro details and focus on why you should consider buying a Synergy sump. In my opinion, Synergy sumps are on a whole other level and are the best of the best. I own several sumps from leading manufacturers; Fiji, Trigger, Eshopps, Waterbox, Red Sea, and others. When you look at the overall design, layout, and craftsmanship – from a distance, most appear to be quality, but this is where Synergy separates itself from the pack. Looking closely, Senergy sumps are refined and polished like jewelry - every dimension is spot on and square. Every seam, edge, hole, and cover represents perfection. You can tell their craftsmen take pride in their workmanship. Not only are Synergy sumps brilliantly refined, but the overall design layout, sectional space, flow, function, and hardware also shine with performance.
I researched sumps for a long time, and I was looking for one that would allow me to configure a custom filter room to support a new freshwater Discus display, and I am so thankful I purchased the Synergy CL-34 Sump. Online photos can be deceiving, but when you have a Synergy sump in your hands, Synergy is a world apart from the others. It gets better, Synergy is a family-owned business, and their products are made here in the USA. I received First-class customer service from initial ordering to updates along the build process to the final shipping verification. Other companies should take note. Synergy is a fantastic company - you can tell they have a mission: producing high-quality crafted products made in America while providing top-notch customer service. My Synergy sump has been up and running for months now, and I am pleased to say that my Synergy has performed flawlessly, and based on the overall craftsmanship, it might just outlive me. This is my honest review, and I have no direct relationship with Synergy besides being a customer. I have not received compensation or free products for leaving my review... Alan - Olympia, WA. January 2023

Tyler Sortino
Amazing quality!

All I have to say is WOW! Perfect for my 100g build. Amazing quality and amazing customer service. The sump is amazing and the attention to details is spot on. By far the best sump I’ve purchased. Will be a returning customer when another is needed

Tom s
Top notch

Reefing is a hobby of gear and if you’re like me you want your gear to look as good as your tank and you want to show it off.
You will not be disappointed!

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