RC...bought everything and finally put it together, same config as yours, except instead of the computer siding I strapped the difuser heads to a tire to be weighted and dropped in pond....question is the (eco-7) doesnt seem to push a large quantity of air through the three elbows with the diffuser heads off....Im afraid this wont produce a significant boil...I have 100 ft weighted hose to push through....the only other thing I did was place the plastic hose and attached it ti the inflow valve and drilled a hole through the pet carrier to allow it access to outside air....what are your thoughts and experiences with a dry run?