Hi I have had a blue crowntail Betta for about a year now and probably around 1.3 years old. He is a very happy fish been taken care of like a family member. His set up is: 1.5 gallon water No heater (as the temperature at my place is mostly around 26 deg C / 80 deg F) No filter (I do full water change every 4 days) Note: Everytime that I change the water I add a drop of Continuum fraction solution in the 1.5 gallon water to remove concentrated chlorine, ammonia and chloramine from it. It's a water conditioner bought from local pet store. I give him 6 micro pellets (each time at morning and night) of Optimum Betta brand which he loves. Now the issue is that I started noticing the tip of a strand of his dorsal fin turning white about 3 weeks ago. Gradually a big part of his dorsal fin till its body turned transluscent / lost color which used to be a beautiful shade of dark crimson. He is still active, eating fine.... I don't understand what's up with his fin! Now I am noticing that the tip of one of the strand of his anal fin has turned white. Can someone please help understand what could be wrong? His eyes have a little bulge but upon examination and research online..I think this bulge is normal and not popeye. Attaching his pics for reference. Thank you for all the help.