I have made a complete water change like I always do last nigh and to day in the morning i came back to discover that my bettas fins look like they are loosing pigmentation in patches. I cant say that they are holes, they look like transparent patches, but this happened literally overnight. The only difference I made was I didn't add salt like I have been for a little while now, since i decided to stop as I know it builds resistance. Any ideas?
He is in a 1,5 gallon tank. Temp 81F, I do 40% water changes every other day and 100% change once a week. I've had this guy for almost a year now. Water parameters are fine no Nitrates or Nitrites, change was made with same water as usual, so I'm stomped.
No other fish around. I showed him a mirror just to take a better picture. But you can see the spots even when hes not flared.
Its just so odd how it happened over night. I'm thinking could it be some sort of Chlorine burn or something? I did add Prime tho, and let it sit for 20min before letting him into the clean tank.
Hes active, eating, blowing bubbles, maybe just a tad discolored, but otherwise seems normal.
Could it be some sort of severe fin rot?