PH Test confusion?
I have never been into water testing and had my tank up and running for over a year doing just water changers every week on a Friday. After reading here I know I should of been keeping an eye on it so I get a water testing kit call Nutrafin and checked the water yesterday. Everything was fine but the PH was or looked like 6.5 (I've read guppy's like 7.2) so I was ready to try PH up if a water change didn't help. I went to the LFS an he told me he would get some in tomorrow for me. Anyway I ended up getting a second PH tester and tried this one and it read the water was 7.2 this one was a API. So now I'm not sure what to do I tested the water again today and took pic's.
this one is the Nutrafin which looks like 6.5 to me.
and this one is the API which like 7.2.
I'm not sure what to do so any help would be grate
API test kit is prolly closer to being acurate. Personally, I would put both away and continue as you have been with weekly water change which will keep pH stable.
1077 is correct, the API kit is reliable. Many of us use it. You're correct, livebearers need hard basic water, 7.2 is fine for guppies as you probably have some mineral hardness as well.
Ferret is also correct, using chemicals is dangerous. The pH of water is mainly due to the hardness, and a higher KH (carbonate hardness) acts as a "buffer" to maintain a stable pH. Adjusting the pH with chemicals is temporary; within 12-24 hours the water's KH brings it back. Result is fluctuating pH and this is far worse on fish than a stable pH even if somewhat outside their preference. In your case there is no issue anyway, but just for the record, please do not use these adjusting chemicals with fish in the tank. There are safer and natural ways to adjust hardness and pH when that is necessary.
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