Tap water parameters seem off - The Planted Tank Forum
 
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post #1 of 4 (permalink) Old 03-16-2015, 06:11 AM Thread Starter
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Tap water parameters seem off

Hey guys so I'm in the middle of cycling my 40 breeder and I did some tests on my current parameters. I'm coming off a reed tank so I am just learning the basics of freshwater parameters.

Tank parameters are
7.6 PH
7 KH
4 GH
180 TDS

I think those are pretty normal parameters. I'd like to keep CRS so I want to bring down my PH and TDS.

Now my tap water parameters are

7.4 PH
18 KH
5 GH
410 TDS

Is it normal to have such high TDS but low GH? My house does use a water softener since our water in chicago is rock hard and was just wondering how that would play into all this. I don't have fish at the moment but when I do I'll be using 20% Tap and 80% RO water to get around 80 ppm TDS and raise that up with ferts.
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post #2 of 4 (permalink) Old 03-16-2015, 05:48 PM
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Softened water will have high sodium content, since water softeners replace calcium and magnesium ions with sodium ions. That would give you a higher than expected TDS since sodium adds to the TDS. Softened water is not good water for planted tanks. Softened water that also goes through a RO/DI filter is good water.

Hoppy
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post #3 of 4 (permalink) Old 03-16-2015, 11:05 PM Thread Starter
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So in other words I'll need to be using just ro water?
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post #4 of 4 (permalink) Old 03-16-2015, 11:26 PM
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What about softeners that use Potassium pellets instead of Sodium, is that considered bad water for planted tanks too?
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