Whisper Power Filter 30 Whisper Power Filters Are The Best-Selling Brand Of Power Filters In The U.S. Appropriate For Every Size Aquarium, They Provide The Three Types Of Filtration That Your Aquarium Needs: Mechanical Filtration -- To Remove Particles Such As Uneaten Food, Bits Of Plants, Fish Waste, Etc., From The WaterBiological Filtration -- To Provide For The Growth Of A Colony Of Beneficial Bacteria That Will Eliminate Harmful Toxins In The WaterChemical Filtration -- Activated Carbon Removes Compounds That Cause Odors And Discoloration Of The Water .
Biological Filtration -- To provide for the growth of a colony of beneficial bacteria that will eliminate harmful toxins in the water
Chemical Filtration -- Activated carbon removes compounds that cause odors and discoloration of the water
Mechanical Filtration -- To remove particles such as uneaten food, bits of plants, fish waste, etc., from the water
I've had this particular filter for the past 10 years and love it. It's very quiet and very easy to take care of. The water flow is adjustable which is great! I had a hard time finding this elsewhere but luckily Entirely Pets carries it and at a very nice price. Thanks Entirely Pets!