The CaddyStack™ Sponge - Pair of 2 is a reusable sponge add-on designed specifically for the CaddyStack™ Modular Filter Tower.
Each sponge features 3 layers of different density, helping create a balanced flow path while catching debris as water moves through your CaddyStack™. The layered design gives you a simple mechanical filtration op
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Great addition to my sump
These things are great. I bought 2 for each one of my Caddystacks to double them up before my charcoal section. They keep most of the debris from reaching the other sections of the Caddystack
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Richard · September 15, 2026
PERFECT FIT FOR MY TANK!
I love these sponges. They fit perfectly in my Printed Reef CaddyStack. They are easy to clean. This fits perfectly in my 75 gallon Marineland tank that I converted to a AIO with the Fiji drop in kit.