There are very few businesses that are more dependent on water than greenhouses and nurseries. Many of these businesses pump water from a local pond, river, or well. This pumped water carries with it some sand and sediments caused by pumping.  To get rid of these, screen and cartridge filters need to be constantly disassembled for cleaning, sometimes as often as every hour. Injector fertilizers also plug up with dirt, thus manual cleaning becomes a daily routine. Foggers and misters become obsolete without clean water.   WaterguardPH® filters are low cost, fully automatic and self-cleaning filtration systems that do not require maintenance or attendance. Within seconds and without interrupting the main flow, vacuum nozzles effectively suction dirt from the inside of the screen, flushing it out to the drain using just 2 gallons of water.