Well, I've done a lot more reading about fertilizer injection. I have learned this much - the electric units that inject a preset amount of fertilizer solution into the water are a lot better than the cheaper units that depend on water pressure alone (which work much like a Miracle Gro hose end feeder -VERY inaccurate.)
The Stenner electric pump unit looks good - pretty costly, though, at $455. You get what you pay for.
I don't want one that works on water pressure. The M-G hose-end applicator puts out an extremely strong, dark blue fert solution at first, and then it comes out almost clear! It's supposed to uniformly apply a solution of 1 lb of Miracle Gro to 50 gals of water. No Way! - it puts-out half the MG in the first 10 gals and virtually nothing for the last 40 gals! I ran a feeder-full into a 50 gal drum once to verify that.
As I understand it, with the electric unit you can apply a consistent solution regardless of water pressure. Is that right?
Jack
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