finally I got chemical today. I can fire the Garn up soon.....But after I read the direction, i got some issues. I have to fill my Garn, put PreCln chemical ...fire up then drain the water? all 1500gal? where? is it safe to drain in my back yard? and fill up garn again. where did everyone come up with 3000gal of water. My well cannot handle 3000gal of water.