Wow, that's wierd about the water :S
I'm really glad that you figured it out though! How great to have someone knowledgeable in your area to help you :) I hope that Tian-Tian gets completely back to normal after the move.
Oh, I just had a thought, maybe a UV sterilizer would work. You could get a holding tank (10 gallon tanks are cheap) and run it on that, then when you do water changes you could take the water from that tank. It would definitely be more cost effective than trying to run a UV sterilizer on each tank if you end up with multiple bettas and it should kill any bacteria that are present in the water.
Last edited by Kim; 08-22-2009 at 07:15 PM.