(Note: Algae growth is not guaranteed or warranted). Ten cleanings of the similar SURF4: http://youtu.be/0lcHakmG604 The SURF4 floating surface Upflow Algae Scrubber floats at the top of your aquarium, sump or pond and grows algae inside the filter. This algae then consumes all the "bad" things out of the water. It also will cause the nuisance algae in your aquarium or pond to start disappearing. The SURF4 can do this because it give algae the best conditions to grow inside the filter: Strong light, strong flow, and strong attachment points. This lets the algae grab hold inside the filter and growth thick, and in doing so this algae consumes the ammonia, nitrite, nitrate, phosphate, and CO2 out of the aquarium or pond water so that your nuisance algae won't have what it needs to grow. And since the top (lid) of the SURF4 lifts right up, you can just reach in and remove the algae from the filter without having to turn any pumps off, and without taking the filter to the sink. And you can even feed some of the algae to your fish and snails! This lid is designed to keep all the light, and all the sound, inside the filter. Only a small amount of the red light will show up in your aquarium, and only very weak sound will be heard. Matter of fact, the only way you would probably notice the light or the sound is if the aquarium were next to your bed at night (the air pump itself actually makes more noise). The SURF4 requires a high-volume air pump with 4 outlets, or two of the 2-outlet pumps such as the Tetra Whisper AP 300.The LED light is isolated from the power cord, and is triple-sealed against corrosion. The SURF4 is designed for this much feeding per day: 4 Frozen cube, or 40 Pinches of flake, or 40 Square inches (250 square cm) of nori, or 11 grams of pellets. The physical size or number of gallons or liters of water in your tank or sump does not matter. 1 year warranty.
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