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TDS meter: which one ?
I am thinking about buying a TDS meter to monitor
my RO unit and to take the guesswork out of
preparing/mixing water for my tanks. After looking
what is available, I am somewhat confused....
There seems to be different units out there
measuring different things. For example here is a
list of TDS tester from OAKTRON:
Choose TDS 1 & 3 for testing water hardness,
hydroponic fertilizer concentrations and chemical
concentrations. TDS 2 & 4 are perfect for measuring
low range-salinity in koi ponds, aquariums,
recirculating systems and anywhere conductivity
measurements are required. TDS10 measures dual range
ppm/ppt. TDS20 measures dual range µS/mS.
Can anybody shed some light on this? Can anybody
recommend a good TDS tester that is appropriate for
breeding killies? It is my understanding that
hardness (Kh and GH) is most important.
So the question is, do I really want a TDS tester,
or is a hardness test kit good enough?
Any help is greatly appreciated. Thanks.
Wolfgang
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