I'm wanting to do a QT of about a month and in order to reduce water changes I was wanting to do it in a cycled tank. First I filled the HOB filter with nothing but filter floss, then I had the idea I could put some bio balls in there also. Then I was thinking why not have the whole bottom of the tank be bio balls? I could easily sterilize them unlike rock or sand. Anyone do this? Is there any point in doing this? Or is the filter floss alone enough?

