Starting all for reed with high mag and cal

[G_Lows]

So I’d like to switch over to all for reef from 2 part + mag. However I made an overdose mistake about a month ago and I have elevated Cal and mag at 528ppm and 1565ppm. Alk is at 7.8. Should I wait to start using AFR until my cal and mag return to normal? I use an auto water change system at 11% weekly so it’s taking some time for those numbers to come down. Mainly sps tank 40 gal.

 

[Aaron75]

Yes, you want to wait until you reach your ideal baseline.

 

[Randy Holmes-Farley Verified Community Expert]

You could use AFR now and those values will stay about the same, or you could use just an alk supplement such as baking soda for a while while they drop and then when calcium is in line, start the AFR. The magnesium will mostly only decline if you are doign water changes.