I have done three water changes over the last few months with Crystal Sea and I won''t be doing a fourth. Since using this salt I have noticed a thin layer of brown diatoms on the sandbed, corals closing for hours after the change, cloudy water even after mixing for 4 days, both pieces of my pocillapora have turned a light yellow from a rich golden color, and also the CS needs to be chiseled from it's brick-like form that it came in.
Price was not an issue for me, instead I was attracted to the closeness to NSW. At the end of this month I will be switching back to IO, after almost 6 years of using this saltmix I never experienced the problems that I have had over the last few months with CS. I am going to wait for some long term studies before I think about switching over to Crystal Sea.
cheers, Rich
