I posted something about the goings-on in my female guppy tank but the thread seems to have died. The fish are still sick. They have white salt-like deposits on their fins, tails and a couple have it on their bodies. Their fins and tails are also rotting. Ich treatments from salt to maracide to quick cure are having absolutely no effect on it at all. Could this be something else that is NOT ich that needs a different treatment? Thanks.