Bought my tank setup, but the previous owner kept the salinity/specific
gravity at north of 1.026 to keep "parasites down". I've been slowly
lowering it to 1.024 which is at the top of the green zone for all my SG
float calibrations.

But, then I read that anywhere between 1.022 and 1.026 is normal, but
that a low salinity is needed to get rid of parasites.

It could be that both ends of the spectrum are deadly to parasites. Any
comments on this?

And, then what is the best level for a reef aquarium w/ anemone, corals,
and eventually a refugium.

--Kurt