I got a good 5 years out of the Tunze system before the sensors started acting up. I had purchased it used so it was probably at least 8 years old when I finally sold it. I should have kept the pump... because I've been burning through small Maxi Jets at a rate of one every 2 years since then. I think what I have on there now is a little Hydor because thats all our local retailers carry. But at least with it I can buy replacement impellers if/when they break apart.
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