So I'm doing a dwc 5 gallon bucket system, And I've gotten pretty much everything needed except the air pump, the air hoses, and air stones. Considering I'm trying to avoid the cheapy pumps, but at the same time not go overboard with super expensive, would the GH Dual Diaphram pump be adequite for all 4 buckets? Or do I need to go bigger? Also 4 inch airstones, 1 per bucket unless I really need 2 per bucket. This is my first hydro set up so I just want to do it right.