No update for a while, I take it its not going well? I cannot see growing in such a small PC case, let alone with hydroponics. Just a word of advice I would not try getting three plants in there. If indeed you can work out the logistics of the ventilation and everything you are still going to have suffering yields if you try to fit too much into such a small space. You would be a lot better off trying to grow two or even one plant in that space and making them the best you possibly could. Good luck to ya anyways, at least you are trying!