I need to do a water change on Sushi's 2 gallon tank. Overnight I killed a dozen red cherry shrimp that I was acclimating. I've determined that the high pH of my water was the cause. Now I'm paranoid to do Sushi's although he has lived just fine through water changes for the last 6 weeks! So should I just do the same thing I've been doing? I've found in all my chemistry experiments this morning that putting my tap water through a Brita filter lowers the pH. I don't know what else it may be doing though. Oddly enough, after a day of WC, all my tanks are about neutral.