with hard water it is very difficult to say his tail will heal. but the finrot should go away with good care.
Does hard water affect healing? I want his tail to recover fully, so do you think I should get a water softener? Once I fix whatever is causing the ph of 9, I will put some peat moss or driftwood in to lower my tap ph from 7.5 to help him heal. Just a quick side note in case it affects anything but my betta is not in the 20 gallon with the high ph, he's in a 10 gallon right now to heal from his fin rot.