Well the impeller on last powerhead just failed. That makes 2 in about a month. They are both Hagen 402 (50). I tried gluing the last one. Worked for about a day and then it went again. I had them both hooked to a wavemaker power strip, which I am sure caused the problem. SO the question now is do buy new impellers for the 2 of them or do I try something new an go with a SQWD on my return line? The cost should be about the same. I kind of like the idea of the SQWD but I have never had one before.