Does lava rocks reduce TDS - The Planted Tank Forum
 
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post #1 of 5 (permalink) Old 10-13-2012, 05:52 PM Thread Starter
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Does lava rocks reduce TDS

My tap water is 370 and the TDS in my fish tank is sit at 100ish, which fills with lava rocks.
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post #2 of 5 (permalink) Old 10-13-2012, 06:17 PM
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I believe not. Don't see how inert lava rock would use nutrients.

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post #3 of 5 (permalink) Old 10-14-2012, 04:28 PM
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I would not think so.
Tests:

Put a little bit of each thing from the tank into a separate jar of water. One jar would have a handful of the substrate, another would have some driftwood, or rocks (whatever is in the tank), and another would have nothing, just the water.
Test each for GH, KH, pH and TDS every few days.

Plants use many minerals that are in the water, but that is a big drop in TDS. How fast does this happen?
If you did a water change today, and tested the TDS daily, would it show up right away?
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post #4 of 5 (permalink) Old 10-14-2012, 06:02 PM
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Co2 from the tap should gas out and lower ur tds reading.
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post #5 of 5 (permalink) Old 10-14-2012, 06:16 PM
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what else you got in your tank? what substrate?

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