I am currently new at this whole growing scene and want to make sure i focus on the most important things. Me and my friend built our own bubbleponics system with foamcor, a 12 gallon storage bin, airstones, 150 watt flourescent fan (with venitaltion) and plenty of nutrients. we have the grow room then the budding room. Our budding room is 22"/25"/41". What is maximum plants i can fit for optimum growth and how important is pH. Also i need a cheap lighting system for the grow room and a way to get CO2 involved. Any suggestions.