Hey i am currently doing my first grow i have 1 400w MH and 1 T5 2foot 2 bulb. right now i have the t5 on 6 1 inch plants. any tips would be great ive noticed that the first leaves of the plant have started to turn yellow i was thinking that maybe this could be a lack of light. im using miracle grow organic and ferting with aurora grow. i know mgo is not the best choice but i have bought some whole mass soil to transplant them into. also how many plants are able to be kept underneath this lamp till harvest and would i be better off buying a second 2 foot 2 tube? also i am watering about ever 2-3 days with distilled water