I saw the Cha Ching at the local hydro shop. It was really expensive like close to $100 for a bottle that was not very large. How much difference do you think it actually makes in say percentage of increase for the total harvest. You say you use it on occasion. What would be an occasion for using or not using it. If you don't use the Cha Ching do you use just the Big Bloom and molasses or something else instead.