Hey everyone. I redid my aquarium after some disease problems earlier this year and things are going okay so far. All that's in the tank this time around is a betta and my ADF on the other side of a divider (I had the frog in another tank but keeping up with cleaning two was hard for me). There's some sand, driftwood and a couple plants. The betta came from the store with fin rot. I tried adding salt (don't worry, this was before adding frog!), keeping the water super clean, and it didn't help. So I figured it must be bacterial rather than environmental and tried antibiotics (whichever Maracyn that's supposed to work, I know one isn't recommended for fin rot) and didn't notice any improvement. I re-checked the water and there appears to be no ammonia, no nitrite and very low nitrate. Checked pH and it's around 7.2 or 7.4 (hard to be clear on the chart) which is fine far as I know. But my tap water starts at 8.4 or so, could this be the problem for my betta? I know fluctuations aren't good but if it levels out to 7.2/7.4 would it still be an issue? I'm just not sure what to do about the fin rot anymore, it isn't progressing anymore but it isn't getting better either (after a few months now). Sometimes I'll see a bit of regrowth and then the next time I check it's gone. But it isn't getting worse. Could the pH be why the regrowth vanishes, because of water changes?