Looking for a diagnosis!

[gregzz4]

I agree with daniella, stick to the bottle dose and do not stop it until everyone looks cleared up. If you go every other day, you may cause an immunity in the 'bugs'.
Do all of your normal maintenance, and if you're not, once a week water changes.
Something to consider too, is that you should turn your skimmer off during treatment. If they are all in a QT, I'd recommend using a HOB filter with no carbon. Read the last line below.

This is straight from the Seachem site;

Q: Is ParaGuard™ safe for use in marine reef tanks with invertebrates and soft corals?
A: We do not sell or market ParaGuard as invert safe because it would be impossible to test it with every available invert under every potential water parameter. We have had people use it with invertabrates with no problems, but we have also had people encounter problems. If you decide to use it we stress caution; dose at 1/4 to 1/2 dose and observe how your inverts and soft corals react. If they seem to tolerate the dosing, increase slowly up to no more than the prescribed dose as long as they are tolerating it. If you need to get rid of the ParaGuard™ quickly, just turn your skimmer back on.