I have been using rocks from outside since they worked well for the set up of my tank and I wouldn't have to buy them... I cleaned them off with water and a little bit of mild hand soap but I've been having problems with moss growing in my tank. I was wondering if that moss growth would be bad for my turtle and if so, how can I get it to stop? Is there some treatment I can put on the rocks too kill the moss? Responses would be deeply appreciated!

~Cmtst