ok first off you need to pull all snails and hermits out of tank. { did this when i had my 24g ap } turn carbon and phos off, actually i took media out and let them run to get treatment in it also. dose and leave for 8 hr's. i didnt do it a week apart though, i skipped a day then treated again, doing same thing, fter dosing run carbon after the water change, repeat this process 3 time's doing larger wc after each treatment. this isnt something that after dosing corals are immediately going to be brighter or have great polyp extension, but it does kill off the red bugs, and after a small period you will notice enfected corals starting to open up