This is from the website "DIRECTIONS: This product is designed to be mixed into a 30% solution. (3 g / 10 mL, 30 g / 100 mL, 300 g / L). You can mix only what you need but amounts less than 100 mL will require very accurate measurement. YOU WILL NEED A SCALE TO USE THIS PRODUCT ACCURATELY. Add half total desired volume of water to container, then add weighed amount of RescueCal + to water while stirring, and then top off water to desired volume. It can take up to 30 minutes for the minerals to fully dissolve in water. Starting with HOT water will decrease this time but is not necessary."
So you would need to add 15ml of water stir in 9 g of the product and then top off to 30ml.
