I have 4 whisper filters on one of my 10 gallon fish tank. I was planning to put that on the tank first and then put in a cheap little fish to keep the cycle going until I get the frog. I forgot to say that while I am waiting to get the frog I will get another filter that is better for for bioload, so it can cycle a little bit before it has to deal with the frogs bioload. I forgot( I know, I am forgetful,lol) to say what the filter was.http://www.amazon.com/Tetra-25816-Wh...per+10i+filter