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RE: RO for aquaria
> Date: Wed, 4 Feb 1998 04:13:01 -0800 (PST)
> From: cprokes at awinc_com (cp)
> Since my well water hardness is 430ppm and house has built in ion
> exchange water softener, I was convinced that Reverse Osmosis system is
> approach for me to get good quality water for my tanks. I was searching
> in the Krib, FAQ and Web but only general statements and rejection tables
> were found. I have decided on 35gal/day unit, which will give me more
> will ever need. My question is on actual set-up because storage tank will
be only three
> gal. Do I have a barrel where to store and mix with my raw water? If not
> mixing with raw water, what needs to be added to get proper chemistry?
> kind of heaters you use to preheat the water before adding during the
> changes? Is a copper piping O.K. to use for the distribution?
> Your answers will be much appreciated.
My well produces similarly hard water Charlie. I also use a household
water softener, though in my case it's purchase was primarily because of
the aquariums. :)
In an effort to minimize required maintenance efforts I have created a
fully automated system which runs the softened water through RO and DI
units, into a 100 gallon reservoir in my crawl space. From there a small
pump fills a pressure tank which feeds faucets directly over each aquarium.
That same pressurized distribution system is plumbed into float valves on
the trickle filters so that replacement of evaporated water is automatic.
It is very important not to use metal pipe or fittings for any stage after
the RO unit. Very pure water is, as one person described it to me "Ion
hungry" and will corrode copper or brass. Parts of what I have built are
PVC and other parts are CPVC.
Originally I intended to mix raw well water with the purified water to
bring the hardness up to a desirable level, but in practice I have found I
am much more comfortable using only the purified water and adding calcium,
magnesium, Kent RO Right, and good old sodium bicarbonate to it. The
makeup of my well water will change with the seasons (and perhaps the
weather?) - by doing things this way I know exactly what I am putting into
The very act of seeking sets something in motion to meet us;
something in the universe, or in the unconscious responds as if
to an invitation. - Jean Shinoda Bolen