Having to cut pieces off a brand new purchased item is NOT very user friendly. This is also not described in the included instructions. I have the unit sitting on the rim of the tank at the only height possible, why is there no way to adjust the height? It is not described on the package that the water level must be 2" - 3" lower for the unit to function properly or I would have bought a different skimmer. To not include a couple of different length pieces of PVC is unacceptable if you intend to hold the customer responsible for a necessary modification of a brand new item.
Trevor Allen.