For example, a minimum wage of $10 per hour will have no effect for workers whose marginal productivity in a given line of work is greater than $10 per hour. The legal supply and demand remains unchanged for such labor.
One way to keep control of the time you run the swimming pool pump is to run it several times a day for short periods of time. If you want to activate the pump once a day, start with six hours, but never go lower than five hours, especially in the summer. If your pool is in constant use, you may need to run the pump for up to eight hours per day, frequently checking the water clarity and chemical balance.
If you have a reasonably large pump that almost always gets done in less than 24 hours a day. A relatively small pump attached to a relatively large pool may need to run 24 hours a day. Often two speed pumps run on low speed need to be run 24 hours a day, because low speed corresponds to a very small pump.