An air stone is a must it prevents root rot. cover the wholes with some duck tape or something. if you get alot of light in the res you will develope algae and possibly get root rot. As for the yellowing of your leaves its normal with the ag but you might want to check your ph. DO NOT ADD NUTES until your second week. I added the starter nutes on day one and the result was what i believe to be nute burn. i flushed and added nutes at week 2 and everything is fine now.sorry to double post
this airstone pump thing everyone seems to be using... is it a neccessity? i dont really want to use one, will it affect my growth? also, i got 3 growing, 2 at the back left/right and 1 at the front, do i need to cover the other un-used holes?
When do you suggest to put that in? From day one ? or flowering or what not.you need an air stone, i use a 6 inch fish aquarium stone and then you need the air line that goes with it and also an air pump total cost about 15 to 20 bucks.