*SICK* I have a couple of loaches and they, just today, started looking pale to me. They are active and eating (I think) but while their fins still look red, and body yellow-ish the black stripes seem more grey. I checked amonia, nitrites, nitrates, ph etc and all are stable and safe. Also I have great water circulation. The few other fish in the tank are happy. What should I do? THANKS for your HELP!