NFT hydro

Changed the tank(rez) for 40 ltrs of clean water and feed and ph'd to around 6.0. I let the ph fluctuate alittle as the plants take up different elements of the feed at different ph levels. They are on a feeding schedule of 4x15min intervals on a staggered timer when the lights are on and when the lights are off the pump is off plants dont feed in the night period so when you over feed and the lights come on the plants then draw up the solution and the leaves burn!! All my plants are on piss weak feed and you only have to look at my results to know you dont 13 bottles of feeding crap to achieve good results