Do you have an ATO? Dissolving the powder in rodi
then adding it to your ATO reservoir might work. Just watch for any scaling or precipitate after the first cycle. It won't hurt anything the first try, but if it's evident all the mag is not getting into the tank you will have to divide the dose and add it every day or 2.
For daily dosing option, you need to divide the dose you calculated by the max daily addition (20 ppm
So your 110 point addition should be spaced over 5-6 days. That means divide your 164 gm by 5-6 and add it daily.
Once you've brought it up you need to reduce your dosing until it stabilizes at your target level.
As he mentioned raising the mag will have an effect on your calc and all levels depending on your coral stocking levels. It may raise them both in a lightly stocked tank or it may lower them both in a heavily stocked tank ( there are biologic and non-biologic factors that compete here).
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