My boyfriend betta fish has what we beleive to be finrot again he had a couple holes in his top fin so we added a catappa leaf in there to see if it would help but his fin got worse and it was looking all torn up last night. I was wondering how I should treat him? When we first got him he had finrot and we treated him with aquarium salt but I don’t want to do that again because it’s stressful. I was planning on making a catappa leaf extract by boiling the leafs but I don’t know if it will work ? Should I dechloranate the water before I boil the leafs in it or will the chlorine boil out? How much should I use for his 5gal tank?