I just wanted to say that I have had problems with my tank ever since I bought my last batch of fish from Big Al's a few months ago and my whole tank has pretty much died off. Even after quarantine after purchasing, I had no signs of disease and everything was fine. What ever is happening, even killed off my pleco suddenly last night, and those guys are pretty hardy. I am almost suspecting something is up with Edmonton's water quality as I have problems in the past but usually in spring. I am going to do water testing tomorrow and also test the raw tap water...kinda bummed about my fish though, you grow attached over the years..but these things do happen. *sigh* (PS, I usually have had no problems with Big Al's stock)