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What's missing is the fact that your 2part dosing is making up for thing reg IO is lacking.
Know your history. Regular IO was developed for Fish-Only public aquariums and have never moved off that market.
Read below. THE WORD "CORAL" IS NEVER USED IN GHEIR HISTORYOF THE PRODUCT:
http://www.instantocean.com/science-and-heritage/history-of-innovation.aspx
Two part is alkalinity and calcium; so again, what is missing?



