So I'm pretty sure my 10 gallon is infested with planaria. It's only been a month or so since it was set up but we used this really old topfin freeze dried medley food we found in a caninet. and I think that's where it all came from. The tanks gravel is not dirty because it is new so it must either be from that food or the live fern in the tank. What do I do? There are little white things all over the sides and longer stringy things floating around.