Safe Cleaning of Tank?
I'm thinking of switching over to my 36 gallon tank that I have down in my basement. The thing about this 36 gallon is that, it's been sitting around for about 14 years. So I wondering how should I clean this thing out without using chemicals that may harm my turtles? I really want to clean it out too because there are some blue-ish looking film crusted onto the glass, so any suggestions?