i went tonight after being on here and bought a air pump some tubing a sandstone bubble stick that was suppost to cover the whole back wall...and one of those valves...i can get the pump to pump out air, but after i put the valve thing on no air comes out, ive tried to turn the valve around but no air comes thru...if i blow thru the valve air goes thru...i have the pump on high to see of that was the prob, i bought a fusion quiet power 400...i guess it was the one that was there between the best one and the worst? it also says that it can hook up , up to 4 air operated ornaments, filters or airstones but i cant get it to work?