I got this little 80 gph pump for $5 and put a water bottle on top. I put a piece of 1/2 inch tubing on the outlet, then put that in 5/8 tubing, then glued it to the bottle mouth. I put a piece of cheese cloth so the media won't go back into the pump when it's off. It fits right into one of the small side compartments in my back chamber.
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