I have a seemingly incurable case of fin rot.
First of all: male betta currently alone in tank. 10 gallons. About 80 degrees. Current ammonia, nitrite and nitrate 0. Ph 7.8 (tap water is above 8.8 and doesn't register on high range ph test fyi) currently use API mater test kit. Have had him 8 weeks or so
Got bad advice from a specialty fish store and was told not to change water at all until tank was fully cycled. We cycled with fish in tank. Ammonia never spiked above .5 ppm. When ammonia dropped to 0 (5 weeks in) nitrite peaked at 3.0 ppm before going down as nitrates raised to 20 ppm. 2 days after this all occured came home and his tail was torn up. Treated for 5 days wish maracyn. Left in charcoal cartridge cause it was over 8 days old per instructions. Fins were almost healed. Did 25% water change cause water was really cloudy from meds. Changed cartridge too. His was 4 days after final does of maracyn.
Next day ammonia spiked back to .5 ppm and bit nitrite and nitrate back at 0. Maracyn was not supposed to affect Ben. Bact. 2 days later (day before thanksgiving) tail was completely shredded with 4 half inch long slits. Was fine before I went to work at 5 pm Tuesday (was closely monitoring fins) and shredded at 2 am when I got off work. Called several stores and got conflicting info. Got referred to a local vet trained specifically in aquatics. Was prescribed 250 mg flagyl daily with 20% daily water changes.
By Friday morning had lost over half inch of tail. Was told to add maracyn and maracyn 2. Did all three 5 days. Then discontinued maracyns. Water nasty cause I had to take out cartridge while running meds since it was new. But still did the 25% change daily.
Increased amount of change due to additional meds.
Yesterday he had a rough day. My kid dumped unknown amount of aq. Salt in tank directly. Caught him in he act so I put him in a cup and did 95% water change since I didn't know what was added. Was slowly acclimating him to new tank water. Only majr difference was the ph. Am not sure how tank ph is so much lower Hthan out of the tap (24 hours later new tank is now 7.8 again). Fish already stressed I'm sure. Was replacing 20% to cup with tank water every 20 minutes with intent on xfering when ph levels were similar. Right after 2 change to cup husband knocked it over and poor fish went spilling out into kitchen counter. Caught him before he slid off between counter and stove and rushed to tank.
So far he's still swimming actively and eating well has been through entire ordeal. Rot seems to have slowed or stopped but I have no idea if its healing and have no idea how to id new fin growth. 1week before first round of rot his pectoral fins turned white in he tips. They are still white. Right one a bit curled. Is this a sign he still has it? Basically what now folks?