HELP! got a 55g cichlid tank with 6 medium sized cichlids and a big hifin catfish that has been up and running for 2 weeks now. did a 15g wc yesterday, and now today most of THR has major algae growth, and the hifin has same looking slime all over him as does the THR. NONE of the other fish look like this. See water quality and pics below
PH - 8.0
AM - .25
NI - 0
NA - 10-20
PH - 8.0
AM - .25
NI - 0
NA - 10-20