I am working on building a small grow room for medicinal marijuana here in Mich. I can legally grow 12 plants. The room I am building is approx. 6.5x6ft with 7ft ceilings. I have already got the room framed in and am wiring it now with two seperate 15a breakers. By the way this is in a corner of my basement. It will have a total of 12 duplex outlets in it and one switch for a green light above. I also plan on tapping into my waterline and running hot and cold water to it. (Bye the way I am on a well) my ph is 8.0 (so I know I will have to bring it down) ppm249 (yesterday it was 195) us was 349. One of my questions are these parameters alright except for the ph? Or should I run my water (when ready) through an RO system? I am drywalling the outside and insulating the 2 2x4 walls. (The other two walls are my basement blocks). This is the other question I have I bought 4x8 bye 3/4in. thick styrofoam with somekind of reflective material on one side. The reason I bought this is because it has some R value for an insulation factor. I think this is an underlayment. Anyway the reason I bought it is cause I figured I would use the reflective side for the grow room. I plan on putting it on the inside walls (all 4 of them) and the ceiling. I don't think this is an aluminum foil, the best way to describe it is its kinda semi dull looking and slightly dimpled but looks like a good reflective material. Do you expierenced people think it would be the best to use it with the shinny side reflecting the light or the white styrofoam side? I think I plan on dividing the room in half with mylar or something similar and running cfls for vegetive and a 600whps for flowering. I will also be running appropriate fans and filters. Does this plan sound alright and if there is any suggestions that would help me out it sure would be appreciated? I am a former HVAC contractor who is now retired and trying to straighten out some health issues. So all suggestions are greatly apprecciated. I will try and take some pics as I go. Thanks for listening and if someone could ansewer my questions I would really be happy. Jim