Ive just bought an eheim 2217 and i must say the quality of the materials is great. I havent run it yet as im still setting up my 65 juwel rio. But will probably buy another in a month or 2. These filters are known to be bullet proof and long lived. Eheim classics havent changed in years and theres a good reason for that, theyre are tried and tested.
Eheim, Fluval and Rena are afew to consider.
Fish die belly upward and rise to the surface. It's their way of falling.