Update: All the fish have gained their colors back in the 55g and they are establishing their pecking order now. The striated reds lost their stress bars and look stunning. The Discus in the 55g tank are pooping redish and looks healthy. Female in the 30g laid eggs again, she seems to be doing super well. However,, the pair's feces is black now.
I started the Epsom salt treatment on 3/3/18 at 2tbsx10g. skipped a day and same doses. Then after that, ever other day, I treated at 1tbs per 10 gallons.
In addition to Epsom salt, starting 3/5/18, I treated both tanks with Metro @ 1.5grams for the 30 gallons and 2.5grams for the 55 gallons. I'm also running this treatment without skipping a day for 10 days; today is my forth day. Fish are responding super well to the two treatments, so well that their appetite has increased tremendously.
I did stop the Epsom salt treatment yesterday as I feel that they are digesting their food properly now. The treatment did not negatively affect my 2 cory cats nor pleco in the 55g.