This is my first hydro grow. I've been using this system for a week now and so far so good. 12 feminized alaskan ice plants started from seeds. Just finished week one of veg. Running 2 1000k watt MH's for now. I plan on vegging for two more weeks.
Is it bad to have any of the top of the grow cubes exposed to light? I noticed a couple exposed parts have a powdery white substance which i'm assuming is mold. The directions say to fill the buckets up with hydroton up to 3 inches from the top. My grow cubes are 4 x 4 which means that they would want a whole inch sticking out. I compromised and put the hydroton 4 inches from the top so my grow cubes are even with the top of the buckets. Then I tried to put another layer of hydroton on top to cover the grow cubes.
Is it bad to have any of the top of the grow cubes exposed to light? I noticed a couple exposed parts have a powdery white substance which i'm assuming is mold. The directions say to fill the buckets up with hydroton up to 3 inches from the top. My grow cubes are 4 x 4 which means that they would want a whole inch sticking out. I compromised and put the hydroton 4 inches from the top so my grow cubes are even with the top of the buckets. Then I tried to put another layer of hydroton on top to cover the grow cubes.