Man, I wish I would have built this thing myself.. I hope this type of system can grow me some good weed.. I went with the 6 inch so I could grow some big plants 18-24 inch when they go into flower... I was thinking there would be like CRAZY MAD bubbles, so I am going twith 2 4 inch stones and paste them the bottom withe some aquarium glue or something.. They gave me a bottle of dyna grow.. but no PH up or PH down, so now I have to go to the HYDRO store and get that

1. Should I use something better than Dyna Grow..

2. Is the purpose of the bubbles just add oxygen and/or is it supposed to MIST the roots too. DOES IT REALLY have to be in the middle.. or just as close as I can get it.. The damn things move all over the place, hence the WANT to glue them to the bottom somehow.. The pot are not in the middle.. so what diffy does it make ??