Depleting Magnesium level?

schmcc

New member
Anyone have any input on depleting magnesium level in my reef.Since changing over to my 210 gal reef with all new ro water and sand bed from a 150gal tank to the 210gal the magnesium level on the first test was 1250. second test 2 weeks later 1100.I added esv magnesium to bring the level up to a target of 1350 or maybe 1400.After many years with this reef tank I never had magnesium deplete before.Any thoughts!
 
Are you doing water changes? What mix? Some may be low in magnesium. Try measuring it.

Also, I wouldn't focus too much on 2 measurements, One or both may be in error. A surprisingly large number of "problems" in the forum are mostly test kit error/noise.

How are you supplementing calcium and alkalinity? Some supply some magnesium, others supply none and will result in depletion. The more calcification, the faster the depletion.
 
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