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I'm a new betta fish owner and after a month of having my male betta, he started having rips in his fin. I assumed it was some decorations I was gifted that were too rough so I removed them. I also had plant root tabs that were causing ammonia spikes and giving him fin rot so I got rid of those and did a water change. I noticed he also had scales missing on his face and a scratch on his side near his pectoral fin from what I was assuming to be the sharp coral decoration. I got melafix to treat his fin rot and for his "wound" on his side. After treating him for a week his fins are looking a lot better but his side looks raised still.
Behavior: He's normal swimming around at the bottom and greets me every time I get near his tank. He's not lethargic and still flares his fins and gills at his own reflection. He eats all his food (feedings are once a day and varies between pellets, bloodworms, and freeze-dried mealworms).
These photos are from last night. Idk what it is or what I'm supposed to do from here. Any advice or possible diagnoses?
Tank Information:
5 gallon tank
5-10 gallon heater
TOP FIN Power filter 10 carbon
Water quality readings last night:
Test strips GH 160, kH 80, Nitrite 0 nitrate 0
Ammonia water tester: 0.25 ppm (30% water change was done last night)
General water care:
30% Water change every 4 days
Beneficial bacteria added every change 2.5 mL