5 Pack Pre-Filter Sponge

• 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 of hang-on-back (HOB) and canister filters. The filter intake tube often has large openings, so use a pre filter sponge to prevent fish, shrimp, and sizable debris from getting sucked up and ruining the filter motor. Not only does an intake sponge clear up your water, but it also provides valuable surface area to grow beneficial bacteria.