Prevents small animals and debris from getting sucked up
Increases filter capacity
Uses coarse foam to extend time between cleaning
The pre-filter or intake sponge is a simple foam cylinder that is designed to slip over the intake tube ofhang-on-back (HOB) and canister filters. The filter intake tube often has large openings, so use a
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Always love a good filter sponge helps limit some of my filter stuff. All I have to do is pull off the pre-filter sponge and clean it up from time to time.
kevin · September 6, 2026
Love the photo love that I’m able to just attach you to to the end of my filter and gets a lot of the majority of debris. I’ll have to do is clean it out.