[reefsahoy]

if it's red bugs, and yes you can see it with a magnifying glass, use interceptor. it works like a charm, the only side effect is it kills crabs and shrimp. i used 300% strength as according to bormans (i believe that's his name) suggested once and i haven't seen any red bugs for the last 8 months and all corals made it through ok! after using interceptor do a 40% water change after 8 hours of interceptor addition, then 40% again the next day while using carbon full time for a month.