Your experience is your experience, but my 17 years of fish keeping tell me that what I stated will not harm fish if they are healthy. I have never gotten ich from a water change once. Some of my tanks get water changes once a day at 50%. You can have your opinion, but DO NOT insult other members because they do not agree with you.bigspizz;863454;863454 said:Once again that goes against everything I have ever learned....10 degrees? no way....It gave me ick. and alot of others. T 10 degrees? that is a little much.....I REGRESS!