Can't say the expensive stuff is better than basic mixes. I've tried TM Bioactif and didn't see much change after using 2 buckets. Sticking with reef crystals like everyone else. Pretty consistant levels every mix and 1/2 the price of bioactif.

Then only premium salt mix I felt was worth the extra $$$ was HW Marinemix. But, it's hard to find anyone who carries it locally.