I would suggest taking some water out, mixing a little more salt in it, then pore it back in. Its never a good idea just to put salt directly in the tank

I like to take the same approach for FOWLR as I do for reef. The reason being is that all the fish we keep in FOWLR set-ups come from, or near, the coral reefs in the ocean and will do best when kept in those same water conditions. A very similar approach as we can find in FW. The biggest difference between the fish and the corals (in terms of water quality) is that most fish can be more tolerant to some parameter swings as compaired to most corals.

Many people would disaggree with me on that