Had an aqua clear that worked great for me. As stated what kind do you have? 30 gals you could do the usual clownfish pair or damsels? Gobies? There are some optionsgar man;4401827; said:I am thinking of converting my 30 gallon tank into a saltwater tank. What I need to know is if my HOB filter would work ok for the tank and a short list of stocking options. Any help would be appreciated