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Re: [APD] Goldfish and planted tanks
Small point of interest. A TDS meter is really jsut a
conductivity meter except that the dial, instead of being
calibrated in siemens is units based on a formula based on
You can use either to measure either. Just pick the formula
that seems most apt for your situation. there's stuff on
this in the archives, such as:
and wright Huntley's excellent posting:
Have plants, have fun,
--- Tom Wood <tomwood2 at flash_net> wrote:
> We recently moved to a new home where the total dissolved
> solids (TDS) out
> of the tap measures 470ppm. According to the local
> experts, our tapwater is
> groundwater with a dash of bleach added for 'treatment'.
> The house also has
> a salt-based water softener. My high-tech planted 90
> gallon aquarium
> cratered. Probably not coincidentally, I notice that the
> local waterways
> are almost completely bereft of plantlife.
> I've since installed an RO system which gets the TDS down
> to 15ppm. I'm
> using Kent RO Right to adjust back upward, but if I use
> the Kent
> recommended dosing level for goldfish, the TDS will be
> back close to where
> I started. I cut it in half and am presently at 220ppm
> TDS after making all
> additions, including plant fertilizers, and baking soda
> to get the KH up to
> 5 degrees.
> So the question is, are goldfish sensitive to the TDS
> level in the water in
> terms of long term care and health?
> PS: A TDS meter is a -really- nice gadget to have around.
> I bought this one
> from the same folks that sold me the RO system:
> Made by Milwaukee.
> Aquatic-Plants mailing list
> Aquatic-Plants at actwin_com
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