I just ordered a 4x4x7 grow tent and i already have a 400 watt hps. My questions are if i want to grow 8 -10 plants at a time should i stay with my 400 or go bigger? And whats a good priced blower and carbon filter to get and where to buy? What cfm would be great for the grow tent and light for that? Also how should i set up the exaust system? also, whats the best organic soil nute to get? Sorry for all the questions, but there greatly appreciated. Please only experienced growers. Should I also get a speed control for the blower fan and can i just use 4 in computer fans at the bottom of the tent for intake?? THankx again!!!