Getting powdered All for Reef to dissolve

[bluecheese]

I mix the All for Reef per the instructions on the Tropic Marin website:

To prepare the liquid mineral mixture, dissolve 6 level scoops (approx. 160 g) of Tropic Marin® All-For-Reef Powder in approx. 900 ml of reverse osmosis water, resulting in a total of 1 l of dosing solution.

I use a magnetic stirrer. I usually let it mix at full speed for 24 hours or so. But there's always a good bit of undissolved powder left at the bottom of the container. I've tried warming up the water in the microwave, but that hasn't helped.

Any suggestions?

 

[dedragon]

i do it by hand, stupid ik, but i use a glass stir rod and crush any larger salt crystals i see. It takes forever but that is the only way i got them to mostly dissolve