I have a lot of snails in my tank that used to be the betta tank (betta died). It is currently housing only 2 pygmy cories until I get another betta. There are a ton of ramshorn snails that pile on top of the the food every time I throw some in for the cories, so I'm worried the cories aren't getting enough food. I want to eliminate some of the snails, but I hate to just throw them out and kill them. Also, if I throw them might they spread some disease into the environment?