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Re: [APD] RO/DI units
If you have a RO/DI filter you should really have a TDS meter. Using one of
these is really the only way to know when your DI filter is exhausted. I have
seen Milwaukee pocket TDS meters for $25... however I have not had any
experience with them. I do have a Milwaukee pH controller and have been happy
with it. About which RO unit to buy, I just bought one on Ebay from
aquasafecanada for a very good price. I haven't received it yet, but he has
over 2500 positive feedbacks and only like 2 negative feedbacks, so I imagine I
will also be happy with it. I got a 75gpd 6 stage RO/DI unit for $50, they also
have 100gpd models. As I said, I haven't actually gotten mine, so I can't
really endorse it yet.
Quoting "S. Hieber" <shieber at yahoo_com>:
> I can't advise on which RO unit to buy but to check
> performance, an electrictrical conductivity test might be a
> good general test. RO ought to measure about 5-15
> microSiemens; Di water should read about 0-1 microSiemens.
> There are lots of conductivity testers around, including
> small pocket-sized models. American Marine (Pinpoint) also
> makes a very reliable model.
> Scott H.
> --- Chad Sutton <chadsutton at tampabay_rr.com> wrote:
> > How do I know which unit to purchase? There seems to be
> > an explosion of
> > these lately. I would like to store around 200 gallons
> > of the RO/DI water
> > which I will use to mix saltwater in another container.
> > What tests can I
> > perform to make sure the ro unit is working correctly,
> > chlorine, phosphates,
> > ammonia, etc?
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