I have had my blue hippo for a little over a year now and now she is slow losing her color her dark blue is turn to light blue does any body know what is wrong with here or is there something i can do for her
Have you tried looking into the disease and identification thread? If you could post a picture of your fish here it would be much more helpful to try and determine what it is in order for people to offer sugguestions.
What size tank is she in? What are your water readings? What other livestock do you have in the tank? What do you feed?
Just might be its diet, tang need daily greens. Try algae sheets, Formula 2 there others prepared foods out there as well even use blanched romaine lettuce (organic). I feed my tangs every day with one type or other other fish we eat this as well.