In response to your actual QUESTION, if you get a UV sterilizer, I would highly suggest the Double Helix 9-watt model. I have seen this in action, as I set up a friend/customer with one, and he has almost NO algae in the tank, and has yet to have any parasites, bacteria, or any other infections, and he does not do QT, although he should. Now, maybe he has been very lucky, or maybe it actually works. I'll let you decide whether or not to believe in them, I simply wanted to give you the actual answer to your question. HTH