SixlineRyan

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According to ChatGPT

Instant Ocean:
Matches typical seawater levels
Calcium ~400 ppm
Magnesium ~1320 ppm (close to natural ocean)

Reef Crystals:
Higher calcium and magnesium than standard Instant Ocean
Intended to better support corals and invertebrates without as much supplementation

In hobbyist tests and charts, Reef Crystals often shows:
Calcium nearer 490 ppm
Magnesium near 1440 ppm
Higher alkalinity

I went with Reef Crystals because IO & IORC is al I could find and it had the word Reef on the bucket! 🤣

Obviously, the end result is what matters, and your results speak for themselves.
 

IF YOU HAD TO CHOOSE, WOULD YOU HAVE AN LPS OR SPS DOMINANT REEF TANK?

  • LPS!

    Votes: 68 47.9%
  • SPS!

    Votes: 65 45.8%
  • Other (Please explain in the comments!)

    Votes: 9 6.3%
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