I haven't had ich myself (fingers crossed), but thanks for the heads up. All my tanks have their heaters plugged in except for the quarantine tank I had my little potential female 'scarlet Badis' in....that got unplugged when the last one died (grump). I admit that in the past, when I have mysterious deaths in a tank, I've put a bag of ChemiPure in my filter box. I often wonder about odd pollutants in my tap water that don't get tied up or removed by my filtration or water conditioning steps. I get lazy and don't always run my replacement water through a deionization column (don't have a RO unit). The resin-type chemical filtration often helps solve those issues. However, it also removes a lot of the goodies your plants want and/or the medications you may have added to the tank....so that is a dilemma. And now that I've gone to sponge filtration for many of my tanks, hmmmmmm....that's another dilemma. Anyway, that's one suggestion... Betty Goetz _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member