mellowyellow
Aquarium Advice Freak
On my 30g I only use the filter that came with the kit. The question I have after reading a few questions on AA about filters is it risky to just pull out the old filter and replace it with a new one? I've been reading about friendly bacteria from those in the know at AA about saving some of the old filter. I don't see how. Perhaps I'm reading more into this than is necessary.