Rockwool vs. Soil.
Whichever floats your boat.

Clone adaptation to 250W MH @ 18/6...
It's a weed... it'll survive.

As to ferts...
It is just my opinion, but I wouldn't use Miracle Grow.
I know Garden Knowm (and others) have grown successfully (and very good) using Miracle Grow, so my suggestion is just an opinion.

Nutrients.... there's lots of products out there.
Yeap, depending on your mix of them, you're either veggin' or flowering.
turtle420 Reviewed by turtle420 on . Clones, lights and Ferts Hey guys, me and my dads buddy have just built my new grow cab, i cant remember the deminsions as of right now but its roughly 6ft x 5ft x 2ft deep. I have 2 chambers, a veg chamber with a 250w MH, and a flower chamber with a 400w HPS. The cab is home made and were venting it into the garage and setting up all the fans tomorrow. One of my relatives is getting a 215 card sometime this week and we are going to pick up some clones from a local club. This brings about my first question: Will my Rating: 5