I brought home another betta. I didn't put them in the same tank or anything, but the new boy was lethargic, so I tried putting him (in his tiny glass bowl) next to my existing boy (in his 2.5 gallon tank). Well, I thought I'd seen flaring and strutting, but never like this! I just checked all my old pictures of Gamma, and his fins just aren't fanned out like they are now (see this post for initial pics. Well, in any case, he was in "show" mode I dare say and I realized that his fins look a bit tattered. I was so not used to it that I thought I had a nascent crowntail on my hands for a second. See the attached pic. Is that fin loss? My water parameters are decent, I think -- 0 ammonia, 0 nitrite. I did a water change just yesterday when I had 20 ppm nitrate, but i didn't do a test right after the change. Temp is 82-84 (I can't adjust the heater in his tank, which is why it's so high. I'm moving him to a bigger tank and different heater when it cycles though). PH is a bit high (~8) but was stable for a long time. However, with my last water change, I tried to lower the overall PH by just back lower PH water slowly (over the course of half an hour or hour). Might that have something to do with it? I also may have stressed him just today by rearranging his tank, as I moved some of the plants to a tank with an actual light. I believe he liked being overcrowded with the plants, as his bubble nest grew a lot bigger when I temporarily housed half a dozen floating anacharis and a potted crypt in there. But then, maybe the slower current just allowed his bubble nest to be intact for longer. Anyway, as always I'm probably writing too much, but I hope someone can help me out. I appreciate the advice!