My municipal water PH went way up - The Planted Tank Forum
 
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post #1 of 3 (permalink) Old 05-21-2020, 01:10 AM Thread Starter
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My municipal water PH went way up

Something new to watch out for. When I moved into my new apartment in September the tap water PH was 7.4-7.6. Today my betta was acting strangely, hiding in a corner. As I had lost 2 angels in another tank I was worried something was wrong. I decided to check the PH in the betta tank. It was 8.8. I checked the tap water, 8.8. As it was too late to go to Petco I went to CVS and bought some distilled water. I changed a gallon in the 10, that brought it down to 7.8. I didn't want to risk shocking the betta, so I'll wait until tomorrow to do another gallon and get some chemicals from Petco. My 20L was high also, but since the swordtails like a higher PH and they look like they're doing fine, I'll wait until tomorrow to do anything to that tank. The 75g was at 6.6 my co2 controller is set for 6.4 so it seems to be doing the job, although I've noticed that the co2 has been on more than usual. As I did a fairly large, for me, water change of 20g, I'm wondering if the ph jumped which caused the death of the two angels. The biggest angel still seems to be harassing the smaller ones though.

Does anyone know why municipal water would have so high of a ph jump? The only thing I can imagine is that they switched sources, something that the periodically do here, and that source is much harder.

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post #2 of 3 (permalink) Old 05-21-2020, 03:19 AM
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Water source change is most likely the cause of water parameters change. You can buy RO water, in my area it's like 35cents a gallon, and mix it with tap water for the meantime.

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post #3 of 3 (permalink) Old 05-21-2020, 10:21 PM
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Other possibilities:

- Some water companies add sodium hydroxide to raise pH to prevent acidic water from damaging plumbing. If you contact them, they will tell you if this is so.
- CO2 in tap water will cause pH to rise as it leaves, particularly in low KH water.
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