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Locking filter sock holder
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Solid top support brace to prevent bowing
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Foam filter block
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Protein skimmer section
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Refugium section
WATER FLOW PATH
SECTION DETAILSCRYS18C
SECTION DETAILS
The CRYS18C has 3 main sections. Section 1 of the CUBE design is where the water from the main tank enters through the filter sock. This is the section where the protein skimmer typically sits. Water flows from this section through a slit in the baffle into Section 2.
Section 2 is typically used as the refugium section. Having the refugium facing the front is a nice feature allowing easy maintenance and visibility of the refugium. Water flows to the right and then towards the back over the baffle through the overflow teeth. The wall with the overflow teeth moves up and down to set the water level for Section 1 and Section 2. The water then goes through a foam block and under a baffle into Section 3.
Section 3 is the return section where the return pump will sit, pumping water back to the display tank.


Key Features
1. Drawstring tabs for 7″ drawstring filter socks
2. Locking filter sock holder
3. Foam filter block
4. Full top support brace to prevent bowing
Drawstring Tabs
A tab is located on the top support brace in front of the 1” bulkhead fitting. The purpose of this tabs is to provide a location for tying off 7” diameter filter socks that have drawstrings. The 7″ socks allow for longer times before the filter sock gets clogged and needs to be cleaned or replaced.

Locking Filter Sock Holder
Filter socks snap and lock into the filter sock holders to secure the sock from falling out when it becomes clogged. The 4” filter sock is 100 micron rating.

Awesome
This trigger sump is simple and does the job perfectly, it’s made so well. I fit the skimmer in the sock chamber, middle chamber for refugium and last chamber for pumps. It’s nice and clean looking.
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Fantastic Build Quality and Great Design!
Purchased this sump for use on a 60g rimless cube with a footprint inside the stand of 22×22. Needless to say, that’s not much room, but this bad boy adds 20g of sump & fuge capacity within a very small footprint! I love the design and flowpath as I can have the skimmer and return sections in the back with the nice wide refugium section in front for easy viewing of all my chaeto, pods and other microfauna. All three chambers are pretty good size and I was able to fit a Bubble Magus Curve 7 skimmer in the intake section with room to spare for my heater and probe holder! Again, great design, sturdy build quality and wonderful service from AquaCave!
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Great Sump
This is a great sump!! perfect size to hold my skimmer and provide an excellent space for a refugium. You can’t go wrong with this product!! Very well made and sturdy
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