Is this filter good?
I want to add an extra filter, and I will probably get the biowheel or tetra whisper. I'm not too sure of the biowheel. What does the wheel do? Do I have to replace the wheel often? I dont' want to spend money every month for a new and expensive wheel to replace. If I do get the biowheel, how often must I replace the wheel? Does the filter come with a few filter mediums or do I have to buy them individually, b/c I know the whisper filters come with a few free filter pads already. The whisper is also cheaper by like 5 dollars. So should I get the whisper or biowheel?
I want to add an extra filter, and I will probably get the biowheel or tetra whisper. I'm not too sure of the biowheel. What does the wheel do? Do I have to replace the wheel often? I dont' want to spend money every month for a new and expensive wheel to replace. If I do get the biowheel, how often must I replace the wheel? Does the filter come with a few filter mediums or do I have to buy them individually, b/c I know the whisper filters come with a few free filter pads already. The whisper is also cheaper by like 5 dollars. So should I get the whisper or biowheel?