No need to worry about it. Go buy some GARLIC EXTREME and just put it into the water (according to directions on the bottle) Buy some seaweed or Algae sheets and a clip add a drop or two of Garlic Extreme to the sheet and put it into the tank. Tangs tend to be prone to a lot of disease and using Garlic in their diet Helps strengthen their amune system. Try Brine shrimp as a staple or snack food just make sure its spirulina Brine shrimp since its better than regular brine. But Idealy when he starts eating you will have to shop for a good main food that is inriched with vitamins and protien since keeping a healthy tang keeps it from having Head and Lateral Line Errosion (HLLE) Hope This Helps