rumblesushi;527621; said:Seriously? 2 AC500s on a 180?
Was it lightly stocked? They have good flow rate, but I just wouldn't have thought they'd have the media capacity to deal with a tank that big, unless it was a really light stocking level.
I have never used a HOB at all actually, how are the AC500s? How good are the pumps? Do they clog easily like internals?
They are probably the best "bang for the buck" filters out there. Most of mine are 15 years plus - no parts replaced yet. I think you can get them for $40 or less these days. 500 gph rated, will only clog when your tank is a total mess

...I think you ment The XP2...