Anyone using bio balls in their QT tanks? I like to use live rock in small isolation tanks for bio filtration but the problems are that you can leave it in during copper treatments and there's no way to clean it. You basically have to throw it away. I've been contemplating the use of bioballs instead but wanted to get some ideas/opinions first. I already use an HOB and a sponge filter in each tank. The problem is that when I begin copper treatment I have to remove the filter pads (because they have carbon in them) which also removes a good deal of bio filtration.