Ph Spike With Filtered Water

[busterbrit]

My tap water shows .5ppm of ammonia and the PH is 7.9ppm.

I thought to maybe get water through my PUR water filter to see if that would help with the ammonia and it would lesson the Chlorine.

So I filled a bucket added the dechlorinator and did some tests.

It lowered the ammonia a little to about .3ppm from .5 BUT it raised my PH to off the charts on my API test kit.

Any ideas why this would cause the PH to jump so much?

Thanks!

 

[waterdrop]

Don't know. I suppose it could be that the filter forces the CO2 out of the water and raises the pH that way (CO2 by itself will lower the pH and is able to be in the water in higher concentrations while the water is under pressure in the pipe system.) But I suppose you'd have to analyze the particular filter to really know, or maybe somebody will be familiar with this.

~~waterdrop~~

 

[busterbrit]

Don't know. I suppose it could be that the filter forces the CO2 out of the water and raises the pH that way (CO2 by itself will lower the pH and is able to be in the water in higher concentrations while the water is under pressure in the pipe system.) But I suppose you'd have to analyze the particular filter to really know, or maybe somebody will be familiar with this.

~~waterdrop~~

If that ends up being the reason would the PH lower back as it sits or would it permanentlystay high?

 

[Aphotic Phoenix]

If it was the filter gassing off the CO2, then yes it will stay "high". Get a cup, fill it with normal tap water, let it sit over night and test the pH. That should give you the real pH of your tap water.

BTW...are you using the low range or high range test kit? It would be pretty rare for someone to legitimately max out the high range test.

 

[busterbrit]

If it was the filter gassing off the CO2, then yes it will stay "high". Get a cup, fill it with normal tap water, let it sit over night and test the pH. That should give you the real pH of your tap water.

BTW...are you using the low range or high range test kit? It would be pretty rare for someone to legitimately max out the high range test.

I'm using the high range.

I will do this overnight test. Thanks.