Instruct: Classify a review as either positive or negative.
Query: Not Acceptable

Priming after cleaning or power outage just takes too long, if you get it primed at all. All the advise is useless. It's a bad design. You can hear the impeller cavitate - it's trying to pump, but it takes a cup and patience to fill and refill the thing until IT finally decides to pump some water. And if you have it pumping, it's barely enough to get the wheel going. Did I mention that it eats cartridges - one a week is not uncommon at all since the floss is too fine. It cost a fortune to operate this thing and then the time it takes to clean the impeller that clogs to easily. When I first got it I thought, well people just don't know how to operate and maintain a tank, but let me tell you: This filter is great when it is new but after 3 to 6 month you have it figured out. Get an AquaClear instead and be happy - still not perfect but better than this pos.