Jack,
I'm using an older model A30 Dosmatic - I've had it for several years and only install a rebuild kit every few years - I don't know if they still make that model, or what is comparable. They seem pretty trouble free as long as you inject clean water through them after every use, don't inject any non-soluble fert through them, and use the recommended upstream filter (cheap). I have a smaller Dosatron that I use as a portable injector. The important thing is to get an injector made for your input pressure, flow rate, and covers the injection ratio(s) that will work best for you. The dealer will be able to give you those recommendations. I have my A30 set at the 1:100 ratio, so, if I want to inject 1 lb of fert into every 100 gals of water, I just mix 1 pound of fert into every gal. of inject-able concentrate. The fert bags have recommended ratios for different conditions so offer good starting points.
Steve
|