Maybe you can try this
get a small container ad ro water to it (enough to thaw frozen food covered by the Ro water)
add .5 of a ml of Brightwell AQ vitamarin c to the ro water
add 2.5 ml of the reef plus to the water
add a few drops of the garlic xtreme to the ro water
add one scoop of the focus and metronidazole per frozen cube of fish food and or dry food
let food soak and stir to mix well , food should soak for 10 min
the focus will then adhere the metronidazole to the food
feed for 40 days to sick fish , this is a reef safe remedy and will not harm any sps lps
It's bean created by a very experienced member here, ppl say it really works.