Our client had a filter pump which was beginning to become very loud while operating due to bearing failure. He asked us to replace it with a quieter, more reliable pump. He also had us replace the older filter with a new unit which does not require the use of diatomaceous earth powder.  We installed a Pentair Superflo variable speed pump paired with a Pentair Clean and Clear cartridge filter. He was pleased that he could not even hear the new pump running, and he also liked that there would not...