Quote Originally Posted by Aaron385
As far as doing hydro without an EC or PPM meter.. the best I can say is one day your luck will run out..
I said I did this for a couple years with great results. I don't anymore, since meters are so cheap now. It's not hard to get away with. You just start with 1/4 strength of what the directions call for, then gradually increase until you see small signs of over-nuting, then back off a little, and the proper ppm level for your particular situation is established.

Or buy a meter for $25.
Opie Yutts Reviewed by Opie Yutts on . Best mounting position for co2 generator Today I got something that I have been wanting for a couple of years now. A co2 generator and the various other stuff you need with it. Yippie! All Green Air brand, all from a hydro store. (I know, I'm crazy.) My wife isn't thrilled, but now I get to see if the claims of 20 to 40 percent increase in yeild are true, along with the claims of earlier bloom time. I'm not looking forward to the work involved in tearing apart my grow room and rebuilding it, but I am looking forward to finally getting Rating: 5