A powerhead is a device, submerged in water, that creates current in the tank.what exactly is a powerhead?
It can be used as a filter by attaching a sponge filter to the intake section of the powerhead. Breeders use this type of filtration more commonly. Reason being: the fry will be sucked up in any other type of mechanical filtration.does it filter the water
Prices will vary depending on the desired Gallons Per Hour. Ranging from $10-100how much do they usaully cost?
You do not need one for your tank, though it is recommended. By placing a powerhead in the tank you are simulating an environment similar to the one where piranha are found, rivers. You could even go as far to hook up your powerheads to a current switching device.do i need one for my 55g w/ two 3inch reds?