Did you mix salt water in the tank or outside? When I filled up my deep blue 80, I mistakenly mixed salt in tank (without much salt mixing experience prior) - added too much at once and all if it precipitated and never recovered. Had to empty the whole thing and start over. Big lesson learned.
On new tanks like this one, I always fill it with rodi then add salt slowly. I get the water warm first with good flow. Never had a issue on my past tanks.