"This is by far, the WORST filter I have ever owned! It has worked correctly for maybe 3 days straight. I have a 90 gallon planted aquarium. Some particles of plants got into the filter through the powerhead and it has never worked right since. I did not even know until AFTER I purchased the FB300 that it required a separate power source. I have tried to clear out the particles of plants. the filter works fine for a few hours then the output flow becomes a trickle again. I have cleaned it several times. Nothing works. It is horrible!"