So I noticed some torn fins on my angelfish and I either suspect the other angels have been picking on him/her or it's possible it's fin rot. I've read a couple thing about adding salt and raising the temp a bit to help heal the fins. Now I also have Gourami, swordtail, dragon goby, and 2 plecos and snails in the tank. Would it be okay to add the salt with them in it also? If so what concentration should I add the salt to?