On Fri, 28 Feb 2003 02:01:40 GMT, "Dave Lockwood"
wrote:

I humbly ask for advice. I just got a new paper catalog from Charley's
Greenhouses. In it they list two fertilizer injectors (if you don't count
the non-adjustable educter). Does anyone use these? One costs about $70
and the other about $350. Is one really 5 times as good as the other? What
do you use?

If by the $70 one you mean the E-Z Gro Automatic Fertilization System,
it is definitely not suitable for greenhouse watering. The fertilizer
concentration varies greatly when the water is stopped / started and
water is continually added to the concentrated fertilizer in the tank.
They claim the added water floats on top of the fertilizer solution so
it doesn't really change the output fertilizer concentration. Yeah,
right. Also, it is damn near impossible to determine how much
fertilizer to add to the tank to get a particular output
concentration.

If after reading the above you really want one, then send me email and
we can work something out on the one I have.

deg