Few days ago, I collected some rocks covered with moss (I haven't put them into my tank). One time, when I took a closer look, I saw some kinds of white tiny bugs moving around and a worm (I don't know if there are more of them!?). So now I want to put those rocks into my tank. What should I do with those rocks first to get rid of the bugs and worms? (but not harm the moss). Or I have to throw those rocks away? Thx for your help, guys..