- Joined
- Jul 6, 2020
- Messages
- 6,610
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- Location
- Northeast
- What state or country do you live in
- Connecticut
I have heard people say RC has a higher CA and MG content as well as trace elements and vitamins than IO.Looks like my preferred mix (normal IO) is the cheapest of the bunch. :)
I'm not sure why anyone picks Reef Crystals over normal IO these days.
