TDS survey - The Planted Tank Forum
 
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post #1 of 7 (permalink) Old 12-27-2015, 03:55 AM Thread Starter
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TDS survey

Hi all

if you have a TDS meter please post your current tap water and aquarium water numbers, like this.

T 61 - A 200
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post #2 of 7 (permalink) Old 12-27-2015, 01:25 PM
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T 481 - a 472
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post #3 of 7 (permalink) Old 12-27-2015, 01:57 PM
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T 84 - a 300
300 means I do a water change(hi-tech tank)
Concrete hardscape and ferts slowly bring it up.

T 84 - a 120
Low tech tanks(5) WC based on rising NO3 levels.
Minimal ferts are introduced. No structures that raise TDS.

Hope this helps.
What are we surveying?
City water here, no softening, no R/O etc...


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post #4 of 7 (permalink) Old 12-27-2015, 05:04 PM
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TDS meters are a bit misleading and are really best used to discern a trend such as rising pollutants. When I mix RO water and add enough Equilibrium to reach 5 dGH my TDS reading is about 140 PPM Which would be nearly 10 dGH if it were just calcium that it was reading, but the meter just reads everything that is dissolved in the water. Fish waste, melted plant material etc. seems to make up most of it.

But back to your question, after adding minerals and raising the KH my water starts at about 200 PPM and at the end of the week it has risen in the tank to 450 PPM.

So 200 and 450 high tech tank, re-mineralised RO
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post #5 of 7 (permalink) Old 12-28-2015, 01:50 AM Thread Starter
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the purpose of this survey is to get a general idea of tap water and aquarium TDS numbers. its a metric that is easy to measure with high level of accuracy.
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post #6 of 7 (permalink) Old 12-28-2015, 02:09 AM
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Except that you do not know what you are measuring. There is no way to know how many PPM is minerals, fish waste or something else dissolved in the water.
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post #7 of 7 (permalink) Old 12-28-2015, 07:07 PM Thread Starter
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Quote:
Originally Posted by keymastr View Post
Except that you do not know what you are measuring. There is no way to know how many PPM is minerals, fish waste or something else dissolved in the water.
keymastr

the purpose of this survey is to get a GENERAL idea of tap water and aquarium TDS numbers.

not looking for specifics, not looking for the reasons behind the numbers, there is no claim of some great conclusion to follow.
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