Hey BillyBo,

Good to see a new member. From all that you wrote, it's easy to see that you've read a lot. I think you've got things pretty much nailed down.

Construction of the grow room, I've found, is a constantly evolving process. I think you're good to go.

For the nutrients, you can use many things... I have the General Hydroponics 3-part system. Haven't used it yet, but I beleive it's amongst the best.

Airpump and airstones... don't be cheap here. If what your friend gives you isn't that 'powerfull' and/or good, get good equipment... it's really worth it. The airpump should be dual-outlet. And the airstones? Get the costliest ones! Trust me... I bought three of the cheap ones, just to see their crappy big bubbles, then go to the pet shop and spend more money one buying high quality ones... Don't be frugal on those two things.

For hydrorocks, you can use "hydroton" (the pebbles), or, what I'm doing, use 'lava rocks'... the ones used for BBQs and stuff like that. Just clean them up good... nothing hospital-level clean, but clean.

As to your meter, I suggest (you may get other suggestions, and I'm not necessarily right) you get a multi-function meter... you should be able to measure EC/TDS/ppm/pH and it'd be good to measure water temps... but you can do that with a thermometer.

My meter is a Hanna Grow Chek from BGHydro... it's $130.

As to your lights, what you're planning sounds good. Ideally, in my opinion, get a dual--ballast system... or two ballasts... so, when flowering comes around, you can turn on both the HPS (flowering) and the MH (veg) so you get 800W worth of lights in there... your plants will not complain. This isn't a must... you can get a 'switchable' ballast and, when you're going to use the HPS, you take the MH out. No problem with that. Absolutely none. But, 800W vs 400W... no brainer.

Buy Mylar! the 2mil thick version! That freaking material kicks ass! I liked it so much I covered my car's windows with it... now, you can see all cars being blinded by 99% reflectivity of the sun... and crashing all around you... LOL!!! I'm just kidding... but yeah, Mylar kicks ass!

Best to you, and we're happy to see a new grower,

-turtle420



BTW: You signature looks pretty cool. Nice work.
BTW2: We grow tomatoes... not weed.