Just as I thought not too bad...thanks so much for the pics!!! I think you would have more clogging from the life in that filter rather than fish sludge...it was pretty cool to see all that living in there lol.
I agree. My 2250 puts 280gph into the tank and that is through the media. I wonder if you are performing this test right. One thing to be careful of when letting a canister filter go so long between service is a thing called short-circuiting. No an electrical thing, its a "path of least resistance thing. It is possible to move water by the media in a canister when the media gets clogged. The water just "goes around" the obstructed media. The media is by no means sealed in its own chambers so essentially you are getting blow by. Again, however, you should be getting way more than you are from a 2260.