ok i got a 55 gallon tank that had two of these marine land 550 power heads i think is what they are called. they run but wont push any water anybody got any ideas as to why
hmm...either they are broken or somthing is blocking flow. If you dont feel comfy pulling them apart to check all the parts are in working order then I would suggest takeing them back to your LFS and have them check to see what the deal is.