Another water thread about TDS - The Planted Tank Forum
 
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post #1 of 5 (permalink) Old 11-09-2009, 08:46 PM Thread Starter
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Another water thread about TDS

So I just received my nice Hannah TDS meter in the mail and I cant seem to wrap my head around what the reading mean since in my tanks they dont correspond to ph at all.

My CRS tank with ADA AS has a reading of ~200ppm PH 7.0
Discus tank with ADA AS has a reading of ~270ppm PH 6.4
Tap is ~150 PH 7.8

With the tap having the highest PH out of the 3 but lowest TDS.


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post #2 of 5 (permalink) Old 11-09-2009, 09:02 PM
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Quote:
Originally Posted by bsmith View Post
So I just received my nice Hannah TDS meter in the mail and I cant seem to wrap my head around what the reading mean since in my tanks they dont correspond to ph at all.

My CRS tank with ADA AS has a reading of ~200ppm PH 7.0
Discus tank with ADA AS has a reading of ~270ppm PH 6.4
Tap is ~150 PH 7.8

With the tap having the highest PH out of the 3 but lowest TDS.

TDS is not really related to PH. Acidic water can also have a high TDS. It can tell you how much "stuff" is in the water but it can't tell you what the "stuff" is.
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post #3 of 5 (permalink) Old 11-09-2009, 09:35 PM Thread Starter
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I always thought that to "soften" the water was to take out the dissolved solids. But it looks like ADA Aquasoil takes nothing out.


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post #4 of 5 (permalink) Old 11-09-2009, 11:53 PM
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The only way to remove solids from your water it to run it through filtering systems like RO/DI. My RO/DI produces 0 readings
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post #5 of 5 (permalink) Old 12-01-2009, 10:06 AM
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Softening typically means removing hardness cations - primarily calcium and magnesium. In a residential softener, those ions are replaced with sodium ions.

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