Thanks everyone. I prefer liquids because I only want to make up as much solution as I will use in one day. I dont want to store any chemicals in the house aside from a bottle of concentrate. From what I understand, powders make up 1 gallon. Is this information correct?

I wont have problems following directions. I'm a formulating chemist with 20 years experience. I work with chemicals all day long but working with them at home is something totally different!!