Electronic GH meter/tester - The Planted Tank Forum
 
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post #1 of 7 (permalink) Old 02-06-2013, 09:28 PM Thread Starter
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Electronic GH meter/tester

Is there such a thing and if so who makes one. I am lazy and the drop check method sucks. Unless someone can tell me a really good one that changes color instead of kind of chamges color

55 Planted Rummys,2 GBR,8 Corys,4 Discus PFR Culls
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post #2 of 7 (permalink) Old 02-08-2013, 05:30 AM Thread Starter
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No one knows of one

55 Planted Rummys,2 GBR,8 Corys,4 Discus PFR Culls
Many shrimp tanks

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post #3 of 7 (permalink) Old 02-08-2013, 09:59 AM
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I am not aware of an electronic GH meter.

However, I have read reviews that LaMotte makes an excellent (albeit pricey) GH test kit.

http://www.lamotte.com/pages/common/...t/4824drlt.pdf

Anthony


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post #4 of 7 (permalink) Old 02-09-2013, 01:28 AM
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post #5 of 7 (permalink) Old 11-19-2013, 05:17 PM
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http://en.wikipedia.org/wiki/TDS_meter

You may be able to use one of these? Just looking into it myself.
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post #6 of 7 (permalink) Old 11-19-2013, 05:22 PM
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I use my tds meter for water change water. Whatever remineralizer you're using will hit a corresponding tds for gh values.

A meter for this actually does exist, it uses ion selective electrodes. You would need to get a divalent one for measuring gh. Probably very expensive, and not worth it for our hobby.

http://www.tps.com.au/products/specific-ion/wp-90.htm


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Last edited by xmas_one; 11-19-2013 at 06:33 PM. Reason: found a meter
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post #7 of 7 (permalink) Old 11-19-2020, 06:05 AM
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A tds test is not reliable as a test for gh or kh. tds tests for all disolved solids by checking the electrical potential of the ewater, as such, it even registers salt content. Gh tests for mainly calcium and magnesium. Kh is carbonate hardness. All three need to be done, and not a single one can be trusted as a test for all three, as they test different things. TDS is a good start as it shows overall conditions, but it does not tell you what exactly is in your water. So you can have mineral depleted water, with not a trace of calcium, magnesium or anything else in it, but it has a lot of salt in, and have other water with nothing except a very high level of calcium, and both can give off the exact same TDS reading... So lesson is, don't trust one for all. I myself would really love a gh tester, and a kh tester, as so far I have only found electronic testers for pH and TDS.
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