First time grower, I guess this would be a DWC setup... I couldnt find any guide on how to set one up like this so i just kind of came up with this from looking at other bucket setups. I was curious as to any advice you guys could provide. I dont have a humidifier and i live in very dry conditions... will that tub filled with water make it humid enough in there? Also I have 1 400w HPS lamp. You guys think i could do 4 plants in here?