04-17-2008, 06:04 PM
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As stated, more than one betta probably means the tails are shreaded from fighting.
If the bettas live alone, then it is possible they are chewing their own tails. (if its not fin rot). This is caused by boredom, anxiety (mine does it when his bubbler gets noisy. it drives him nuts) and some just like to chew their tails (some theorize that faster current makes the tail drag, thus irritating them...)
. If he's bored, try a bigger tank, with more stuff to see, if hes nervous, try a quieter corner with little traffic (of people). Limit his lighted time (they don't need as much light as most tropicals anyways) etc. If its none of the above.. well its his tail, he'll chew it if he wants to.
The big thing to remember if it IS tail chewing, is to keep your water PRISTINE. His tail is essentially an open wound. Thus, do lots of water changes, keep the temp warm (80ish is a happy temp for them anways) and if you are so inclined, add some AQUARIUM salt, abt 1/2tsp/gallon (not marine or table) while he heals. Not everyone does the salt part.
PS.. if you're still concerned, try to get a pic for diagnosis purposes