ok. in two weeks i am getting a turtle. only one. I want every thing to be perfect. how should i clean the tank to get ALL the germs out? How should i set up the tank? There is a lot of scum on the tank because of the fish that use to be in it. how can i get it off. i have tried scrubbing it and it won't come off. I don't want to by products for it. i own vinegar though. if you have any extera information i would appreciate it! Thanks!!!