Had a bala die today. Around his mouth was red and going back to his gills. Today had some cotton looking spots on him. I seperated him from the rest of my tank. The rest of my tank looks good but worried. Other balas are acting kind of funny now. Are they depressed or coming down with somthing? Did the one pop his nose and just start going. Tech stuff 55 gal tank 3 balas at 4", one gourami at 4, 5 zebra danios, 4 octos, and one clown pleco. Wife will not let me put up 120 gal up until Christmas. Than 240 up summer. Side bar three nights ago temp droped four degrees. Oh this started about 5 days ago.