I have an Eheim 2217 and 2 Topfin 20's on my 55g. I'm looking to get rid of the 2 20's. Any suggestions?
I was thinking a sponge filter would be a good choice for bio filtration, but I've never used one? Anyone have any experience with these?
I was thinking a sponge filter would be a good choice for bio filtration, but I've never used one? Anyone have any experience with these?
