Reef Octopus

Octo Reef Sump 36A

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This item ships directly from CoralVue.


Octo Reef Sumps offer attractive design, the versatility and features you need, and they’re built to last. Each Octo Reef sump is hand-built from solid acrylic for years of trouble-free service. They’ve got you covered with plenty of room for your skimmer and return pump, and they also feature a built-in ATO reservoir.



  • Reef Octopus red color accents (matches other Reef Octopus products)
  • Solid acrylic construction
  • Adjustable water depth from 5.1” to 9”
  • Dedicated protein skimmer (and/or reactor) chamber
  • Dedicated return pump chamber
  • Dedicated freshwater reservoir with lid for ATO
  • Bubble-diffusing intake chamber with lid
  • Built to accommodate roller filter mats like the Klir Filter Di-4


One of the standout features is actually the filter sock compartment. Of course, if you want to run standard 4 inch filter socks, you definitely can, but if you’re looking to upgrade to a lower-maintenance option like one of the new Klir rollermat filters, Octo Reef sumps have been designed with this in mind. The filter sock chamber has been built with an overflow designed for operation with the Klir DI-4 fleece filter system.


Another hobbyist-friendly feature is the ability to adjust the water level in the sump. All OCTO Sump models have the ability to adjust the water depth inside from 5.1” all the way up to 9”. This makes it super easy to set the right depth for your protein skimmer to perform optimally without the need to buy a separate stand to raise it.


Get it right the first time and go with an Octo Reef sump. Their meticulous craftsmanship and hobbyist-minded features ensure this will be a sump you can be proud of.



  • Dimensions: 35.83"L x 18.11"W x 15.75"L
  • Skimmer Section: 16.97"L x 16.14"W
  • Return Pump Section: 11.8"L x 8.6"W
  • ATO Volume: 6.6 gallons
  • Adjustable Water Level: 5.1" to 9"
  • Drain Input Fittings: 2
  • Drain Size: 1"
  • Filter Socks: 2
  • Filter Sock Size: 4"


More Information
Product Name Octo Reef Sump 36A - Reef Octopus
SKU 213861
Vendor CoralVue
UPC 6950291252074
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Product Questions

Will the Octo 36 Sump support two Klir DI-4 filters, or just one?
Question by: Becca on Feb 11, 2022, 8:30 AM
Great question! This sump will be able to support 2 of the Klir DI-4 filters.
Answer by: Kyle Thomas (BRS Staff) on Feb 16, 2022, 11:12 AM
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