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Old 08/17/2007, 07:11 PM   #17
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Join Date: Mar 2006
Location: Dallas, Texas
Posts: 2,333
Timers would qualify as what I would consider "switching mechanisms." I used the generic term simply because there are so many different ways to changer flow patterns within a tank. Point is just having your pumps running constantly without changing direction or turning on/off is not ideal. You can run the non-variable speed Tunzes on timers, you just have to have the on/off cycles to be at least 20-30 minutes long.

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