We purchased a juvenile Zebra Obliquidens he was placed in our 150 gallon. He would not eat and was pale and hiding behind the filters all the time. I took him out and placed him in a 5 gallon bucket with an airstone. he is still showing no color and not eating. I added epsom salt and have been changing the five gallon bucket water with a mix of tank water and fresh daily. I tried feeding him some Metro soaked food but he would not eat so I started treating the water with Metro, since that was the antibiotic I have on hand .water parameters were good in 150 gallon every other fish we purchased is in good shape. I don't know what to do with this guy.