Ive had some serious difficulty in starting up a new freshwater tank. It’s been about a month now and I’ve lost over a dozen fish. I had my water tested and also tested it myself and it looks like everything is fine. The only thing I’ve noticed is a white film on some of the fish. I read about Ick and also used an Ick treatment. It either didn’t work, keeps coming back, or it isn’t Ick at all. Here’s a pic of the Platy I found dead this morning...you can see there’s a good amount of the white film on it. Any ideas what this might be??