JodiLH

Hi. I have a fairly new 30 gal set up. I am having close to the same issue keeping my fish alive. Water tests perfect every day. I bought an extra bio filter so now I have 2. Temp is 78-82. Everything was great, clear tank, happy fish, then all of a sudden different ailments every other week. White patches, fin rot, scales coming off. I've treated with API Pimafix, API Melafix and salt. Did water changes. Ok for a week, then fish start dying. 2 mystery snails, 4 platties, had 4 gloweye tetras, had 4 danoes, and a zebra loach. It's been set up for about 6 weeks and I've lost all together, 6 zebra danoes, 2 platties, & 5 redeye's. I dont get it. Most of the time I cant even find a corpse. Meanwhile, my beta in his little tank is thriving. Any advice would be appreciated. Bout ready to give up. Thank you for your time. Jodi