Bests & Worsts Reviews from Amazon

This attachment works exactly as advertised. I'm not sure why people are complaining about it only being used for re-filling, that's all it was designed to do. I vacuum my tank with the original python attachment and then swap it out for this one. I don't run a lid on my 65 gallon so this is very useful to me. It's pretty ridiculous to one star a product just because you don't understand how it works or you're using it wrong.