Hello Irene,
Last night after my post to you I watch your video on GH & KH and did the tests. Sure enough PH crash. So I added some Equilibrium. This morning the boy is much improved, breathing better and more active. His fins look terrible. Could the PH crash, which probably has been going on for a while, cause the deterioration of his fins?
Once I get the tank perimeters corrected and the boy feel back to his old self I will try again with the maracyn/Ich-x.
Thank you again for all your help!😊