This is a coarse pre filter sponge for filter intakes. This bridges the gap between the small and large sponge filters. Working best on most mid sized hang on back filters. Half inch hole for filter intake. Can stretch a bit if needed. Our pre filter sponges are closed on one end to prevent fry from being sucked up.

Intake hole: 1/2 inch

Diameter: 2 1/2 inch

Length: 3 inches

Medium Pre Filter Sponge

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This is a coarse pre filter sponge for filter intakes. This bridges the gap between the small and large sponge filters. Working best on most mid sized hang on back filters. Half inch hole for filter intake. Can stretch a bit if needed. Our pre filter sponges are closed on one end to prevent fry from being sucked up.

Intake hole: 1/2 inch

Diameter: 2 1/2 inch

Length: 3 inches

Customer Reviews

Based on 471 reviews
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B
B.S.
Perfect for Aquaclear 20

Fit perfectly and works exactly as described!

J
J.

Ordered this as a cheap on add on to another order. Wasn't sure if it would fit on my filter take, it's probably somewhere around an inch to inch and a half wide, but this stretched around quite easily and fits nice and snug. Dont have to worry about it coming loose at all.

P
P.K.
Great filter

I have this on my pump that moves the water and adds bubbles. It's great now to order another bigger one for my filter. My tank won't be without these again. Thank you Cory for all you teach about fish and plants. You truly make this company incredible along with your staff.