Tetra Whisper Internal Power Filters is three Filters in One. The Whisper in-tank filter adjusts easily to high. Nov 10, 2012 - INSTRUCTIONS, SAFEGUARDS & WARRANTY. 115 Voltios 60 Hz. Model 10 #25771. Model 20 #25772. Model 30 #25773. Model 40 #25774. The filter is designed to operate while filled with water. If the filter runs. USO DEL FILTRO WHISPER. In no event will Tetra® be liable for consequential.

Buzzing is usually a voltage issue. This means there may be low voltage in your neighborhood. That is common when temps are extreme and everyone's heat is really cranking it out. If the filter is plugged into a power strip with surge protection, that usually eliminates the noise. Another possibility could be build up, sludge, hard water deposits, other debris on the impeller or in the motor. Taking it apart and cleaning it may resolve the issue. The last possible cause would be an improperly balanced impeller.

If you take it apart and give it a good cleaning with white vinegar, and have a good power strip, and it still buzzes, call our Care Team at 1-800-526-0650. The unit has a 2 year warranty with receipt.