hydro farm makes a 800 gph pump for like $45. i use it to supply 18 drip sites.u really dont want to skimp on the pump.i would check em out there available pretty much everywere and there relatively cheap and verry effective. if u run 12 seperate lines its going to be harder to pump all those 1/4 lines to full capacity,i know that GH sells the laser line in 6 ft lengths. for verry cheap .and if u hooked up one of those to 2 laser spray lines u wouldnt have any problems.after all GH is the inventor of the square aero systems.