pH Test Kits Compared. Azoo Reigns Supreme

Above images from left to right are AZOO, Tetra, and API pH test kits.










The sample tested was a pH Standard 7 solution.




We dropped the reagent separately, mixing evenly after each drop, and waited for the color change.







The result of API’s kit is pH=7.6.






The result of Tetra’s kit is pH=7.5.






The AZOO’s kit is pH=7.0.






Finally, we used a digital pH meter to test the water sample confirming it was pH 7.0.  The AZOO pH test was more accurate and easier to read than the other brands.