I had a tank sitter watch my tank for a few days, and I come home to a huge cyano outbreak . I performed a hydrogen peroxide dip on the zoa frags in order to kill the cyano attached to them. Picture 1 shows the nasty red slime covering the zoas. Needed items: 3% hydrogen peroxide from the drug store Bowl Beaker or other water storage device Water from the tank Steps: 1. Fill the bowl and beaker with tank water. 2. Place infected zoas in bowl. (Picture 2) 3. Begin slowly adding the H2O2 over the course of several minutes while stirring. Once you see bubbles forming on the cyano stop adding H2O2. (Picture 3) 4. Let the zoas bathe in the solution for approximately 10 minutes. 5. Remove zoas from the solution and rinse with tank water reserved in beaker. 6. Place zoas back in the tank. Reminder: Zaos are poisonous and have excellent aim. They can and will shoot you in the eye. Use your gloves and safety glasses. Don't be the cool guy that loses an eye.