This is from Rex Grigg's website.

Rex's Guide to Dosing Dry Ferts

For Plantex CSM mix 1 tablespoon or three teaspoons into 250 ml of water and dose 4 ml of this solution 3 times a week into 10 gallons of water. You can go higher or lower than this dose based on the observation of your aquarium.


I use CSM+B dry, pre-mix the night before in a cup of water.

This is another very good link on dosing strategy;

_Dosing Regime's_ - The Planted Tank Forum