Reef Crystal IO salt

[rayjay]

Just be sure to make the change gradual.
Perhaps just add water mixed at 1.028 instead of your normal top up water (to replace evaporation) until the level comes up to where you choose to keep it.
That being said, there are many who keep their reef tanks at 1.024. Obviously you do need to boost the calcium and magnesium if you want NSW levels for those elements, but not wanting the NSW s.g. level.
With FOWLR, changes to salinity still need to make made gradually in an upwards direction, but can be made rapidly in the downward direction because of the way osmoregulation works with fish.