Water Drop in the shape of a Question Mark


What kind of media does Defender® use?

How does the cost of Defender® compare to sand filters?

Is there a pool size limit in order to use Defender® filters?

How long does the “media regeneration” cycle take?

What is “bumping” and how long does it take?

Is the Defender® filter system fully automatic?

What happens to peripheral systems (heat, chemicals, UV) when the Defender® shuts down for bumping?

How often should I change the media?

How long does it take to change the media?


In regards to UV, what is the difference between medium and low pressure UV?

What is UV dose and how is it determined?

What is UV transmittance and how does it influence equipment selection?

FAQs November 5, 2014