Tropical Fish Keeping - Aquarium fish care and resources

Tropical Fish Keeping - Aquarium fish care and resources (http://www.tropicalfishkeeping.com/)
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-   -   testing PH (http://www.tropicalfishkeeping.com/beginner-freshwater-aquarium/testing-ph-4088/)

dhiggins 03-10-2007 11:14 AM

testing PH
 
which is most accurate, liquid or test strips? when I test with Wardley's liquid drops I get an 8.4 alkaline result. When I test with Quick Dip 5 tests in 1, I get a 6.8 neutral result. any suggestions??

Derek-M 03-10-2007 11:25 AM

I would have to say that the liquid test are more accurate, but still not great.. If you want accurate you would have to invest in a electronic meter.

Something like pinpoint ph meter would do you well
http://www.marineandreef.com/shoppro...s_pinpoint.htm

dhiggins 03-10-2007 11:42 AM

thanks for the suggestion derek, ironically when I returned two day old dead fish to "Petco" with a water sample which yielded lower PH result with a test strip than my liquid test did ,I was told that liquid test were not very accurate. hence i purchased a strip test kit to find these different results.

musho3210 03-10-2007 12:30 PM

Re: testing PH
 
Quote:

Originally Posted by dhiggins
which is most accurate, liquid or test strips? when I test with Wardley's liquid drops I get an 8.4 alkaline result. When I test with Quick Dip 5 tests in 1, I get a 6.8 neutral result. any suggestions??

all dip in test strips for me get the same results, i used mardel 5 in one and i got 6.8, just like you. With API liquid i get 7.4. Im going with the 7.4 since technically lake michigan water (the water that comes out of my tap) is a hard water lake.

fish_4_all 03-10-2007 01:26 PM

I used test strips when I started back up 4 years ago. I went by their results and could never keep an otos or a pleco alive. Switched to liquid regent and found my test strips were off by as much as 200% on average with NO3 and PO4 results, ammonia was actually 0 when the tets strpis showed .5ppm and the pH was actually 7.4 when the test strip showerd it was 6.6. I will never use them again. Now you can get a bad liquid test kit and it can be easy to throw the test results off from a dirty test tube, not shaking enough, drop size and other factors but overall they are much more accurate.


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