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TSD readings?

Gary Nelson

Gary Nelson

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Joined
20 Jan 2011
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1,292
Location
Leicestershire
This maybe a silly question, but what should be the ideal TDS readings in a planted tank? If there is such a thing as a general good reading?

My G6 indicates 906! My weekly water change is due tomorrow and I expect going from last weeks water change it will drop to around 730 ish.

I'm a bit confused here, can anyone advise or shed some light :rolleyes:
 
Your G6 is telling you the Electric Conductivity not the TDS gary, while i believe they are closely related (and may even have a conversion??) they read differently. My G6 used to show 650 after WC and 750-800 by the end of the week which in TDS terms was 200-250 beginning of week and 350 ish by the end of the week if i believe the G6 and TDS pen and remember correctly (g6 is gone now)

Cue an expert with the science....
 
Yeah as said above g6 measures conductivity and TDS is a measurement of the total dissolved solids. My g6 used to read 500+ by the end of the week but TDS measured by my TDS pen was less than 250 ppm. I tended to ignore my g6 as a reading more use it to see if it changed unusually. Depending on why you need to know I'd opt for a TDS pen.
Cheerio
Ady
 
Gary Nelson said:
This maybe a silly question, but what should be the ideal TDS readings in a planted tank? If there is such a thing as a general good reading?

My G6 indicates 906! My weekly water change is due tomorrow and I expect going from last weeks water change it will drop to around 730 ish.

I'm a bit confused here, can anyone advise or shed some light :rolleyes:
Click to expand...
I've never seen any correlation between TDS and plant health. There is a small number of species that do best in low alkalinity, such as R. macandra and Tonina, but TDS/Conductivity are measurements best ignored from a plant health perspective. Concentrate more on CO2/flow distribution and nutrition. Conductivity readings are mostly irrelevant.

Cheers,
 
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