so i baught a 300 watt cfl. so i dont think lights are the problem, but my last harvest i found my buds to be small and real airy. so i was gonna try changing my soil from vegetable grow bags to coco and still if that doesn't work i was going to change my water from 400 ppm ( hard water (b4 nutes)) to 0 ppm radiator fluid. as it has a ppm of 4 ... or 0... i think there was something on my ppm tester ... its about 2 quid a L. my humidity is also too low. and my tempreture is marginally too high. could anyone tell me what would have the most detrimental effect to my end product. thanks.