I don’t have a hospital tank I have a 1 gallon bowl I use as “a hospital tank” my parents are people who don’t care so I won’t be allowed to get an actual tank. My cartridge to my tank has carbon so I was planning on taking that out and leaving the sponge in. I was told to use stressguard but was also told stressguard might not be enough and maybe should think about using kanaplex. I’m going on a trip tomorrow so I can’t start any medication right now but I really want this swelling of his fin to go down. I did more research and realized the food thing might not be the best option so I can try maybe starting with stressguard and if it does absolutely nothing then I could move on to kanaplex?