The following are characteristics of Modernism: 1  Marked by a strong and intentional break with tradition. 2  Belief that the world is created in the act of perceiving it; that is, the world is what we say it is. 3  There is no such thing as absolute truth.  No connection with history or institutions.
Pool filter cartridges can run for about 2,000 hours for a filter pump. Usually filter cartridges have to be replaced once every 1 or 2 years. The life of the filter will be less if you enter the pool with suntan lotion, deodorants, mousse, styling gels, and other damaging chemicals.
The sand you are using could be too small, which will go through the filter system, then back into the pool. 1  Remove the sand and replace it with the proper grade of sand - #20 Silica or 45-55mm pool sand, which can be found at your local pool dealer. 2  Your swimming pool pump may be too big for your filter.