- Increases Filter Capacity
- Prevents Small Fish and Debris from Getting Sucked Up
- 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 of hang-on-back (HOB) and canister filters. The filter intake tube often has large openings that allow sizable objects to get sucked up by the filter, potentially ruining the motor, so use a pre-filter sponge to help prevent baby fish, dwarf shrimp, little snails, plant leaves, fish food, and other debris from entering the filter. (depending on filters suction, and size of animal, tiny fry/shrimp/snails can still get through in some cases)
An intake sponge also provides valuable surface area to grow beneficial bacteria, which purify waste chemicals in the water and make it safe for your fish to live in. Finally, it adds mechanical filtration that extends the life and efficiency of your filter media.
I have to replace this every once in a while. They are simple yet beneficial for creating surface area for bacteria. Also prevent fry and shrimp from getting a joy ride to death.
Baby shrimp and newborn guppies are VERY tiny, and the filter cover helps keep them safe…at least from getting sucked into my hang on back filters.
Great quality, durable, good flow. Highly recommended.
It firs my Aquaclear 70 just fine.
Great product, doesn't get clogged up like other pre filters.