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Old 11-06-2019, 11:39 PM   #1
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I need help with the ph in my 20 gal. freshwatwer. when I finish a h20 change the ph is about 7.6. I use seachem neutral regulator in small amounts. the problem is my tap water is very hard but the drinking water is treated so the water actually has a low ph of about 7.4. iF i don't do a water change once a week , but wait a few additional days, the ph is 8.6. how does that happen? polluted water is more acid, right? so how does old water become alkaline? this was a problem before I used the seachem neutral regulator, so I don't think it is the source of the problem. how does water go in at 7.4 and become 8.6 after about a week and a few days/ I am losing fish that cant take the ph changes even though they are considered hardy. please help if you can.

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Old 11-07-2019, 03:45 PM   #2
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The water is off gassing c02. Get a glass of water from your tap. Let it sit out 24-48 hours and test it. I bet it's higher than when it first came out.

8.6 is a little high but shouldn't be killing fish. What kind of fish do you have?

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Old 11-07-2019, 06:16 PM   #3
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Hello cad...

I steady pH is all the fish need. If you're keeping fish from the local pet store, the store is very likely using the same water you have. You just use a water treatment like Seachem's "Safe" and work to the point you remove and replace half the water every week. No excuses. This will maintain a level pH.

"Fear not, my young apprentice. Just change the tank water."
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Old Yesterday, 11:17 PM   #4
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do you have an air stone or diffuser in your tank? I made that mistake, bought a new air pump that came with a diffuser so I thought I would add it to the tank. Within about 3 days my PH went from 7.2-8.4. CO2 off gassing. Shut it off and dropped back to normal in about 3 days.
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level, ph level

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