sdruuk

I have 12 plants in a 3x4 room lined in tin foil under a 250w hps.
They are about 2 weeks old and looking pretty good. I started them in 1/2 gallon pots and recently moved them all into a 20 gallon rubbermaid container. I was wondering if its going to hurt them to all be in the same bucket? I plan on keeping an eye on them for the sex when I start flowering them. Can I just cut the males off at the stem or do I have to remove the whole plant? I also didn't give them any plant food for the first week or so then I transplanted them into the rubbermaid bucket and used miraclegrow soil is this okay? The PH level is at 6.5 and are looking good. I also did not plan on giving them any other fertilizer. Is this okay?

Thanks, Sdruuk