[Ice]

ok to start the room is 4x4 and kept at 75degrees , i have a 4oo watt mhalide set up , i have 8 babies , going on 2 weeks now into grow the largest plant is 3 1/2 inches now , but when i checked them this mornin my largest plants bottom 2 round leaves arent as green as they have been , kinda like a greenish yellow. i thought maybe over watering or not watering enough , but i have those water meters that sticks in the soil and tells u how moist it is, and according to that all is well , havent started to use ferts yet , so i know its not that , anyone got any ideas , and should i be worried? and 2 more questions , i read unoit's grow journal which was gr8 since im doin the bubbler system also , but at what age or height is it ok to transplant into the bubblers ? and also i was told to get some fetrs , red , green and purple i think it was , i cant find anything like it around here , only place i can find it is on net , and i cant purchase from net , so my question is will just a regular plant food solution work in the bubbler system?cuz i have several diff mixes of ferts , by this i mean i have one that is 20-20-20 , 10-5-10 , and also have one that is 12-5-6.anyone got any ideas? and thanx again for all the earlier help everyone, i looked in the guides , but it realy doesnt say what u can use , it only says what that perticular grow guide recomends