I have a 20 gallon tank with 2 angels (3" & 4"), an African clawed frog (2"), a comet (3.75"), an Opaline gourami (3.5"), and a bristle nose pleco (7" hides under a treasure chest all day except for food) and I know my tank is crowded but I'm working on that. Ive had the tank for almost a year now. As long as I have had the tank alkaline has been off and the pH has always
been too low(acidic) no matter what Ive done to it, Ive tried salt(not for the pH), crushed coral, pH increase all at the recommendation of what Ive got from fish stores (petco, petsmart, pet supermarket, fish fantasia and one at the mall).
For the past couple of weeks Ive been trying to get my fish healthy.
-The small angel's fins are ripped (probably from the other angel),
-the frog has a hole in his lip that ick started growing out of and barely eats (ick is gone I hope, hole remains) but the frog loves the comet's tail,
-the Opaline gourami's scales look like they are either falling off or decaying and now his lips are somewhat red and the base of his fins are too, his rear fin has a big chunk out of the middle and hasn't healed for over a month (at night he sits at the back of the tank and swims back and forth an inch or so),
-the comet's mouth is messed up the one side is inverted but that's not much of a problem as its been like that for 5 months.
I change about 2 gallons a week tap water w/ Amquel to get rid of chlorine (tap tests better than walmart drinking water I was using before).
In the morning I feed them frozen brine shrimp or blood worms, at night I feed them Omega One first flake and the pleco gets an algae disc.
Ive been using stress zyme, and treated ick with quick cure. The only fish that is fine is the pleco and he hides all day. I only have one fake plant and the treasure chest right now because I have a problem with algae if I put too much stuff in there. Ive tried searching and I cant find any info on whats wrong or what to do.
Gourami you cant see it too good in the pictures
Comet's mouth hard to see left side
The colors on the pictures didn't come out right but then again I'm using flash and sorry for the long post