What I was trying to say was that if your bag as 800 milligrams, you need to also look at the net weight. As you will have more than 800 milligrams in the bag due to filler. If there are 1.5 ounces in the package, containing 1600milligrams of drug, you need to use half the package per gallon to get 800 milligrams per gallon. Too little drug increases rate of resistant bacteria, too much can be poisonous.