check the water (ph, hardness, ammonia, call the system and ask for a report). Your water system could've switched sources or additives. It sounded like disease symptoms, but disease can be touched off by any stressful change. Were the 3 fish the same age? Bettas are one of the few tropical fish that actually are as short-lived as the stores tell you and all elderly are more prone to all sort of health issues.
Last edited by emc7; 02-22-2010 at 08:21 PM.
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