What size is your tank? 1.5 Gallon
What temperature is your tank?
Does your tank have a filter? Yes
Does your tank have an air stone or other type of aeration? No
Is your tank heated? No
What tank mates does your betta fish live with? None
What type of food do you feed your betta...
My HM betta Comet got severe fin rot about 2 weeks ago which took half his tail in a single day. I treated him for in a 1.5 gallon tank with bottled water for 10 days with salt and did 100% changes daily. His tail soon started showing clear regrowth which has now started to darken as it gets...