[From the jrpeters blog page:]
"The 5-12-26 + Calcium Nitrate is a great vegetative fertilizer if you need to modify your nitrogen needs or to fit in with your specific water types. This combo can be used to grow a wide range of crops from lettuces, herbs, and fruiting crops. In its simplest formula you can mix ½ tsp. of each product in a gallon of water. I generally do not recommend this rate, but if you only need a small amount, it works. To make 10 gallons of solution follow this formula:
In 10 gallons of water, dissolve 1.3 ounces of 5-12-26, when that is totally dissolved add 1 tablespoon of Epsom salts for extra Magnesium and Sulfur. Finally add in .86 ounces of Calcium Nitrate. This will give you 150ppm of Nitrogen, which is the perfect rate for growing hydroponically.
M.O.S.T- mix of soluble trace- This is a fully soluble package of micronutrients. This is great to have on hand if you are growing in RO or very pure water. Remember that all of our fertilizers except Calcium Nitrate have a micronutrient package."
I just ordered the 4lb + 4lb combo pack; I'm on city well water so I don't think I need MOST.