So the fish decided they are done with the Hex Shield treatment. They nibbled it last night and stayed away from it this morning. I added some flakes to make sure they had an appetite and they accepted those greedily. I don't see anymore white feces and out of some I have seen some colored feces so that is a good sign. I hope we are out of the woods. I did treat the tank with Epsome salts after doing 90% water change last night.