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please help! I fist noticed the barbs fins becoming redder but, just thought this was normal ( they are called red tailed barbs) but then noticed red areas on skin mainly at base of fin which at first seemed like a blister it was raised but then became flat as if under the surface of the skin after i dosed the tank with tetracycline. pretty much same thing with the cat fish he was looking like Rudolf with a large red raised sore on his nose( or where a nose would be if they had one) pre-treatment and now the blister has popped and is now a dull pink wound as in the pic. both are acting normal swim and eat no change in behavior. but other fish in tank seem to be attracted to the redness on the barb because they nibble at it.
i really don't know much about fish and how to care for them but i am really trying to learn. i have become attached to them and want to save them!
i use a dip test strip for the following:
ph-6.0 i know this is not good it use to be at 7.0 but past two months or so it has dropped i started using a store bought chemical to raise it slowly but not sure if i'm doing that right still low and I'm scared to add to much of it at a time.
no live plants
community tank total of 12 fish only two with red areas/spots/blister? however i do think maybe they are showing signs of fin rot not sure but tails are looking frayed.
treatment- tetracycline x4 doses with a 25% water change after 2nd and 4th dose. now adding melafix once a day for 7 days (on day 4)