use a known good airstone and test each output on each pump. use lines of varying length and see what happens.

and don't so much worry about the price but the quality of the pump.


-shake
headshake Reviewed by headshake on . DWC Pump Problems Ok so I have 8 rubbermaids (2 gal or so) with 1 plant in each. I have 4 duel outlet pumps I picked up at walmart however the airline hose to some is fairly long and barely any bubbles come out after a few days of running. They say the output is 2.5 psi. I am aware that shorter hose length is a possible solution but I don't really have the option of haivng the pumps inside the area due to having nowhere to elevate them over the water level and no power source to plug em. So I guess my Rating: 5