I'm not planing on going all out with sensors and such.

Using the ELK to control the injection, I can find a good ball park for an average day and either manually adjust it (by computer) from there as needed, or, if i do decide to go all out, make some complex rules to automatically compensate for amount of sunlight etc., but I still think this would just help with keeping me in the ball park.

I'm curious as to what to look for in a pump, and how to plumb it to avoid back flow and such. Suggestions on storage tanks would be nice too.

Don't worry about me holding you liable if something you say doesn't work for me, I know I'm perfectly capable of screwing things up on my own. I'm just looking for ideas for my setup.