Starting indoor for the first time. Ive got everything picked out except two things. Ill be using ebb & flood and im curious what i can use for medium that will go the life cycle of the plant and reusable. I dont want to have to change anything if at all possible. I also am wondering about what nutes to use. And as far as Co2 production im looking at some material that you put in a bucket and theres a motor on top, not sure how that works but it said it lasts up to 3 monthes for a 10'x10' room. Does that sound familiar? I forgot the name and im away from my book. Ill be using either a 400 w or 800 w Leds with a general oscillating fan in the room so heat shouldnt be a factor right? Also should i use anything to keep the water cool or not necessary for indoors? Any thoughts will be nice.