when i used ocean water my salinity level was high too. Have you tested the water lately? what are the levels at? high salt in my tank hurt my LR, coral, and everybody took a bit of a hit. i live in hawaii and have great access to the ocean, but i found that i get better purity with mixing salt, and purified water and sometimes distilled water. but thats just me . im interested to see what the pro's say about this.
what size tank do you have what fish, and how long has it been going?
having those will help everybody answer a bit better.
have fun watching you little guys.