clones are about a week old and I have about 20 going under 20watt flouro annd ina hdome I have no sign of rooting but they are Perkin up! and some leaves are turning yellow is that ok? also some that havesigns of darrrrk spots is that mold? is it safe to cut off or is that stressful. looking to lst some shorties with t5 for my flower I don't have much for for hps. do mh bulbs generate alot of heat? and my last questin where can I get some equipment for cheap?