I dont have pics up yet but i will later, it just started not too long ago but i watered them yesterday and now its getting worse. the older leaf tips r turning yellow and brown and the newer sets of leaves are losing there green color all over and r getting lighter but not yellow yet. what could it be? should i flush? or up my ph or something?
It's hard to say without pics. But I was having a similar problem. Turned out my Ph was too acidic. Do you have a Ph meter? What kind of lights, and how close to the plants are they? How old are the plants? How often do you water? Any nutes? What soil do you use?