Ok. Try taking a sample of your water to the LFS for testing. Hopefully they will use either a Salifert or Elos kit to test it, and see if your readings are accurate. I have found Hagen kits to be fairly inaccurate.
GFO = granulated ferric oxide. It absorbs phosphates. This will help with the diatoms and cyano.
Please take a peek at your skimmer and find out the brand name and model, or take a picture of it and maybe we can identify it. Unfortunately, many (probably most) LFS employees are inexperienced and I do not trust their judgement without talking to them myself.
As for the corals, the bubble, acan and brain will all accept target feedings of mysis shrimp. The rest do not need to be fed. I would suggest either target feeding or not feeding them at all, but to avoid feeding the water column with the Reef Roids as too much ends up in nooks and crannies instead of in the corals' mouths so it lies and rots, and creates waste.
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~ Mindy
SPS fanatic.
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