Dirtydan's question on acid injection causes me to ask if any one has experience with the green machine or "add it" injector? They claim "totally proportional from start to finish" Hard for me to believe. They say the fertilizer and water do not mix in the tank. I would think they do and dilutes as it goes, like the hose end things. I have a small one on my drip system and it is OK, since I don't use part of a tank on one place and then move to an other set of drippers. It just feeds one system so I don't really care.

Kenny