Looks like the most serious outbreak of discus pimples I have seen. Your orig post says nitrates >10, how much higher?
I agree with Brian; move to a BB hospital tank with a cycled filter and dose 1tbsp/1gal of salt, 50% wc daily with heated aged water.
A quick update. i added 3 dither fish to the qt tank, serpae tetra. i am doing 50% w/c every day, adding aquarium salt as suggested. I am also adding AquaVitro seed to help start the cycle. But my tank smells horrible as i do w/cs. can anyone suggest what is causing it or how i can reduce the smell. it is quite noticeable.
thanks,
jim