From my experience DWC sucks because when you do a drain and replenish you have to remove the lid then dump the rez. And besides that checking ph you have to keep reaching in the tub, its just messy and that sucks. It is much easier to have rez seperate from where the ladies live. I have someting similar to a DWC, its more like a recirculating DWC. I have a tub on the floor that is my rez very small water pump (8 bucks) that send the nutes into the top tub where the ladies stay. Then in the top tub i have a hose that drains back to the bottom when it gets to a preset level, air stones are in the top. I also have started to feed the ladies on a timer so that i can get maximum oxygen. I grow a 5 plant scrog so with that screen in there rez changes woulda been impossible. For me its all about finding ways to make this process the most easiest. I am actually looking to go aeroponics and grow sog with 35 ladies in a 3x3 tent, now thats gonna kick some ass.