
My aquarium heater is not working properly, what
can I do?
If your heater is not maintaining the correct temperature, make sure it has
been in operation for 36 hours. The heater will slowly raise or lower the
temperature over time. This will prevent a large temperature swing that can
shock the fish. If it is still not working properly, please contact Tetra.

What can I do if my Whisper® Power Filter has
stopped working?
Sometimes, the magnetic impeller assembly can become clogged with debris. To
clean off fish waste, mineral deposits, etc. you will need to take the
magnetic impeller assembly out of the filter. Take the rubber end cap pieces
off the top and bottom. Slide the magnetic impeller assembly off the metal
shaft and place both the impeller and the metal shaft in white vinegar. The
metal shaft and magnetic impeller assembly should be soaked side by side. Do
this for two hours and then rinse them in warm water. You can now put the
magnetic impeller assembly back together. Check to be sure the magnet and
the white blades are connected as one piece. If they have become separated,
you will need a new impeller. This separation is covered under our 2-year
warranty.

What should I do if my Tetratec® Air Pump is not
producing air or is very loud?
An air pump that loses power or gets very loud may have a bad rubber
diaphragm. These parts are located inside the pump. Just remove the screws
on the bottom of the pump to open it up. The round rubber disk is the
diaphragm.Each pump has a lifetime-limited warranty for manufacturing
defects. Water damage does not fall under the warranty. So make sure you are
using a drip loop and check valve. If you cannot do this, make sure the pump
is higher than the aquarium. Also, the pump is for indoor use only. The
rubber parts, such as the diaphragm, are considered a “wear and tear” item.
The life of the rubber parts depend on the application. For example, a
diaphragm running a 1” air stone will last much longer than one running a
12” bubble wand. These parts will need to be replaced over time and are not
covered by the warranty. Please purchase these parts from a good local pet
store.