No kidding. And my water is perfect. I have a liquid API test kit and to be sure it was working I had the LFS check my water. He was very pleased. Not Petco or Petsmart but a real LFS. What I want is an inline UV sterilizer but I can't find one that is strong enough for parasites and fungus. I have some fish that have been around forever and then some random fish get something. I don't get it when I have perfect water conditions I have lost 2 tetras to cottenmouth. 1 pleco to I don't know what. I think new tank syndrome. 1 dwarf flame gourami to a sore that just took over fast. And a frog to I don't know what. Just dead one day.