I had recently purchased live plants and fish from my pet store, and I believe that they brought some form of a parasite with them. My older fish in my tank have no outward signs of a parasite, but they are obviously bothered. They keep flicking their fins, then rubbing against the decor in the tank. My JD has even stopped coming out to eat. I'm not sure what I should do for them, I'm going to be giving the tank water changes every other day. But I'm very worried, none of them are looking too good.