I was told by one reply I got that I should go with the sunshine #4 mix. I'm doing two think different plants in 5 gallon smart pots under a 400 watt hps. I'm thinking of building a cab 6 ft high 3 ft deep and 3 ft wide. Does this sound right as far as the cab size go? And I'm doing the grow with no nutes, though I do gave big bloom and cal mag if needed. Can I get some opinions here