what kind of pump would you recommend

[Steve]

Hi Ron,

I posted this question earlier. I am sure that you get a lot of questions, so I am posting it again. I will have my 1600 gal recirc system set up in a few days...will be stocked with Tilapia. I printed your plans for your 11-plant system and plan on using this for tomatoes. I have been told that I will have a deficiency of Potassium and Phosphorous coming straight out of the recirc. system. (For tomatoes.) Any suggestions as to how I may supplement this w/0 harming the Tilapia. Also, I asked what kind of pump would you recommend for setting up the 11-plant system. Would I be best in setting a pump/timer combination and pump into a barrel for "x" amount of time and then let it drip through the system or what? Any input would be appreciated. Thanks a lot......Steve