Just wondering if it is supposed to be. The aquaclears have three filter media: the sponge, the carbon, and the biomax. I replaced the carbon that came with it with a Chemi-Pure filter medium which is supposed to last for months. The problem is that it takes up more space and pushes my biomax filter halfway above the water.

Is this a problem? I know the biomax is supposed to help out beneficial bacteria. If its only halfway submerged, will it not work as good?