By Marcelle Dibrell
Effective filtration is a cornerstone to proper pool water maintenance and should be second only to adequate sanitation in a service tech’s list of priorities.
A great many pools have just a hint of a haze – not noticeable to most but a good service technician can pick them out. The pool owner may think the water looks good, but tell them to check it out at night with the underwater light on. That haze is dirt, and chemicals cannot fix dirt, but good filtration can.
And then there are those truly cloudy pools and spas. They might be perfectly sanitized, but they are anything but inviting. To obtain truly pristine looking water, a lot of it comes down to the choice of filtration media. Sure, there are many factors that matter, chief among them proper equipment sizing and adequate run time. But all else being equal, the choice of filtration media can play a critical role in water clarity.
That is because each filter type achieves different levels of efficacy, able to filter out increasingly smaller particles, and that makes a difference. We all know that there are three types of filters in common use, but nowadays there are more and more options about what to fill them with.
Take the sand filter, which is capable of filtering down to about 40 microns or better. Many people cannot see down to 40 microns (pollen is 50 microns, by way of example). But a pool with billions of 40 micron particles may look cloudy, especially at night with the light on, and even if your eyesight is not perfect. For those who desire better clarity, there are alternatives to sand, and without buying a whole new filter.
At the other end of the extreme is the DE filter, capable of filtering particles as fine as 0.1 micron. And while it does not get much better than that, users may balk at the potential inhalation dangers, not to mention disposal inconvenience. So manufacturers have risen to the challenge with DE alternatives as well.
It is a good idea to know your options and this special issue of Service Industry News will explore some of them.
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