I recently set up a sorority and now I have a bacterial infection. I only noticed it on one of the fish but it's very obvious, bright red ulcer on her head.
This site recommends a 100% water change. Ok great! I mention that to a friend and they freak because that will cause more stress and can make the infection worse. So now I'm confused. Help!
The tank is a filtered, heated 10 gal. There were 4 betta's but two got evicted due to ful on fighting (not nip and chase but drag out crazy fighting). I know you aren't supposed to have a sorority of two but they are spawn sisters and adore each other and until this clears up I'm not adding more fish. There are also three snails in with them. The snails are very small still.
Last night I did a 50% water change and added salt (1tsp/gal) and raised the temp from 76 to 78. They are still active, eating, begging for attention, etc.
Another question. The two females I removed are not showing symptoms. They are currently in 1 gal un filtered, unheated, tanks (according to the thermometers, they are holding steady at 74 degrees and this set up is temporary until I get my 20 gal set up). Should I treat them as well? They had 100% water changes on sunday and were due for 50% yesterday but mom was in town so I put them off until today.