Hello good people, this is my first post and my first hydro grow. i am currently building a ebb flow system and i was going to use rockwool cubes along with hydroton as my medium in a 2' x 4' tray. should i use one or they other or would both be fine? my next question is how much space do the plants need in the tray? As for feeding times i ve done alot of research and i ve seen many people have different feed times and i wanted to see what was working for you? i plan on using general hydroponics nutes. thank you for all your help and keep up the all the good growing i get lost for hours looking at on this great site