Re: R/O Units

[Christopher R Brightwell <snowcat24@juno.com>]

The Kent Marine RO units typically have a 1:4 product to waste water
ratio.  However, on units that produce 50+ gallons of water a day, the
ratio becomes approximately 1:2.5.  This is depending on tap water
pressure, which is ideally 65 psi, and water temperature, which is
ideally 75-77 F. Also, the TDS of your tapwater affect the unit, but
mostly in the way of life-span for the membrane.  Here in Atlanta, where
the TDS is below 100 ppm, a unit will last some 2,000 gallons or more. 
In areas with high TDS, say over 600 ppm, the unit will produce less. 
The cost of this water is somewhere around 0.5 cents a gallon, plus the
initial cost of the unit.  I run a Maxxima Hi-S 60 gpd at home for my
discus aquarium.  It is a combination RO/deionization filter, and works
very well.
BTW, straight deionized water is another alternative, and costs around 10
cents a gallon.
Chris
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CR Brightwell
snowcat24@juno.com
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