Help. New at this reef stuff. I have purchased 6 clowns, 2-3 different times. Tank is now 6 months old. I take water samples to local store every 2-3 weeks and they keep saying the water is great. Purple tang, sail fin tang, pink spotted goby are doing great. Corals, zoas, Duncan, green hammer, and acans are health and growing. Within a week every clown has developed a thick white film, heavy breathing and die within a day. What can I do? Any recommendations?


