GH is 21! How do I lower? - The Planted Tank Forum
 
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post #1 of 5 (permalink) Old 05-07-2017, 07:51 PM Thread Starter
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GH is 21! How do I lower?

So recently I have a had a few shrimp deaths in my 7gal. I hadn't ever check water hardness before until today as I bought a API test kit. The reading for GH came out as 21 and KH at 8 and from what I can understand that is pretty high. Would this be the reason for the shrimp deaths? If so how do i lower the GH.

I also tested the water straight from the tap and it is 17 GH.

Thanks
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post #2 of 5 (permalink) Old 05-07-2017, 08:13 PM
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Yes, 21 dGH is quite high even for Neocaridina. If your tank's hardness is greater than your tap's likely some stones in your tank are raising it further. The only consistent way to lower your water's hardness is an RO/DI unit (or buying RO/DI water from a store which is very tedious for anything but the smallest tanks). Otherwise be content with keeping only livebearers and Rift Lake cichlids...

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post #3 of 5 (permalink) Old 05-07-2017, 08:40 PM Thread Starter
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What about bettas or scarlet badis? Would they be ok in this water?
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post #4 of 5 (permalink) Old 05-09-2017, 02:06 PM
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You can buy the distilled water from the grocery store, if rodi is out of the question.

edit: sorry, didn't notice he mentioned it already.

If it's a betta tank I had assumed it's a tank that's on the small side, 10 is about the max I see anyone have a betta in and you only need a couple gallons to drop the hardness to ~15
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post #5 of 5 (permalink) Old 05-12-2017, 11:59 AM
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Scarlet badis will not do well. Bettas may be okay if domestically bred.

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