
Trigger Systems Crystal Sumps - Clean & Simple Reef Tank Filtration
If functional and flexible is your goal, the Trigger Systems Crystal sumps are made for you. The Crystal series sumps provide you with a fully functional sump, complete with a filter sock, baffles, and bubble trap. Everything you need, affordable price point, and the flexibility to customize exactly as you desire.
Each sump is made from clear acrylic and features three chambers to hold all of your life support equipment. The locking filter sock holder securely holds 4" socks and includes a threaded PVC coupling for easy connection to your drain. The dual-platform bubble trap baffle allows you to place filter media bag with media of your choice in between the sponges without worry of it escaping. There are three different models suitable for display aquariums as large as 120 gallons.
CRYS18C
- Dimensions: 18″ long x 18″ wide x 15″ high
- Drain/Skimmer Section: 10.875″ x 11″
- Front/Refugium Section: 17.5″ x 6.5″
- Return Pump Section: 6.4375″ x 11″
- Total Water Volume: 20 gallons
- Skimmer Water Level: 9.5″ fixed
CRYS30S
- Dimensions: 30" long x 12" wide x 15" high
- Drain/Skimmer Section: 11" x 11.5"
- Center/Refugium Section: 9.5" x 11.5"
- Return Pump Section: 6" x 11.5"
- Total Water Volume: 21.3 gallons
- Skimmer Water Level: 9.5" fixed
CRYS36S
- Dimensions: 36″ long x 14″ wide x 15″ high
- Drain/Skimmer Section: 12″ x 13.5″
- Center/Refugium Section: 12.25″ x 13.5″
- Return Pump Section: 8″ x 13.5″
- Total Water Volume: 30.6 gallons
- Skimmer Water Level: 9.5″ fixed

With over 25 years of experience keeping aquariums of all kinds, Robert has a detailed understanding of advanced aquarium techniques and theory. Working as a professional content creator in the saltwater aquarium industry for over 18 years, his perspective, thoughtfulness for the hobbyist, and a general understanding of the hobby, and industry that surrounds it, allows Robert to write and create digestible content that makes reefing fun and easy.
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