What does your water currently look like, yellow, cloudy, or has a lot of bubbles? Depending on the situation you could increase flow in the tank, run carbon, use filter socks, or do water changes.
What salt do you use. When I use to use reef crystal my tank looked dirty. I changed to tropical marine about 6 months ago. Now my tank is crystal clear.a lot of peop!e us reef crystal and I do not want to open up Pandora's box hear. But for me I had a water problem.