magnesium uptake in sps tank

[Coleus]

I think the magnemsum depletion rate in your tank depends on your setup. Mine for example, before i have lots of mangroves which consume lots of Mg , so now i took them out and the depletion rate has been dramatically decrease. The best way is bring your Mg to the desired level and then measure again in a day or week then you know how much Mg is consuming by your tank.

Good luck