Let me add that even a n00b can benefit for the use of c02 IF they read before they grow. The most important thing to remember is that during the 20 minutes or so that you c02 is going, make sure your exauste fans are off in that time so that the co2 can work its magic. and the seed bank you mentioned is cool. that is where we get our seeds and we were very happy with not only the seeds but the way they were shipped and the speed with which they arrived. happy growing!!