| The best I have ever used . I have two 30gl. African Cichlid set-ups that I keep over crowded to cut down on the fighting for territory and a 30 gal . community tank and these filters do a great job with the bio-load of each . The bio-wheels do a great job of polishing the water , and a great place to grow good bacteria, this is why they slow down after they been used for awhile , the Bio-wheels build up bacteria and muck , simply rinse them off in dechlorinated water that is the same temp. as your tank water so you do not kill off the bacteria and they will continue to serve you well . Easy to change filters , which I change only one at a time so as not to remove all the bacteria in my filters . And even after my own laziness of going weeks without cleaning it , it will run smooth and whisper quiet . I have never had a problem with noise on any of my 3 Penguin 350 filters , after a water change or power outage just a little shot of water in it to prime it and it starts right up just as quiet as before , and sometimes that is not even needed as the water that was left in it will prime it for me . I will never use any other filter . |
Been very good to me.