Old magnesium pouches. Help.

[usfpaul82]

Hey all. I have a couple of these old magnesium pouches from BRS. They are discontinued and pretty old but I think I can still use them? I don’t think these are 1 gallon mixes but I can’t remember how much water to mix with them. Does anyone know?

 

[a.ocellaris]

I think those are the 1 gallon pre-mixed pouch. The old mix was about 8 cups total if I remember correctly.

 

[Bulk Reef Supply]

The old pre-portioned magnesium packets that came with the old 2-part starter kits (pre-pharma grade version) were portioned out to be mixed with 20 oz of RODI water.