yeah but I think that 160 GPH is a little high for a 7 gallon tank though. And I'm not sure I would trust any filter on E-bay. Its way too easy to rip someone off, or if it stops working 3 months later your basicly screwed.
Well, I think I am just going to buy one of these filters:
Eheim 2213 116gph
Eheim Ecco 2232 not sure of flow but for aquariums around 35gal
Fluval 105 rated for 25gal tank.
If I'm not mistaken, the flow rates are for the filters max output without media (correct me if I'm wrong). I will have approx. 30" of head plus I could put a ball valve on the return and knock those numbers down. According to some, a 10X factor would be around 70gph. That should be obtainable shouldn't it? Let's have the feed back. I don't want to restrict the pump too much so if this isn't possible then let me know. Thanks.