instant ocean or reef crystals?

[Delphinus]

Generally speaking the more you pay for salt, the higher values you'll get on certain parameters such as Calcium, Alkalinity and Magnesium. Some will go further and claim to have better mixes of other trace elements.

I have tried just about every salt there is though, at least once, and to be honest, I'm really happy with Instant Ocean. 1) Can't beat the price, and 2) Everything needs to be added at some point, I add Ca, Alk and Mg, and would have to anyhow, so I find my money seems to go further just going thrifty on the salt and spending the extra on the additives. It works for me.