Corals and Calcium

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Dom

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So... I just watched the video of Dr. Joshi's nano reef tank. No water changes and no protein skimmer. And it leaves me with the following question:

As I understand it, calcium is required for the growth of corals. And as a consumable, we supplement calcium in our tanks. Perhaps by 2-part or even in weekly water changes. My point is that we replace calcium taken up by corals.

Unless I missed something, there is no mention of supplementation of any kind in Dr. Joshi's nano reef.

A tank with corals which is not receiving calcium supplementation, would eventually test for zero calcium. When that happens, will:

1. The corals stay healthy and just stop growing?
2. The corals deteriorate over time as calcium is required to maintain their health and not just for growth?
 

IF YOU HAD TO TAKE A REEFING EXAM, WOULD YOU PASS?

  • Yes!

    Votes: 32 45.7%
  • Not yet, but I have one that I want to buy in mind!

    Votes: 9 12.9%
  • No.

    Votes: 26 37.1%
  • Other (please explain).

    Votes: 3 4.3%
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