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Bertoni came up with an interesting observation: if you are supplementing [an dI hope I'm quoting him right] with 2-part or Kent's or whatever, you're actually adding some mg.
If you are supplementing with kalk, you are not, because there is no mg in kalk.
So if the corals are using mg, and you are not supplying it via your supplement, the net effect is that you are losing mg and need to supplement more.
That may reconcile Randy with Bertoni. Bertoni makes those comments in the thread I linked to above.
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Sk8r
"Make haste slowly." ---Augustus.
"If anything CAN go wrong, it will, and at the worst possible moment."---St. Murphy.
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