Aquarium Pharmacuticals PH test

[frostby]

My test kit has a high ph and a low ph.

I test my water with lowtest and get a blue color which corresponds to a 7.6, which is the limit of the test. I test my water with hightest and get a brown, -similar to 7.8. -the lower limit of this test.

For those of you have these kits, which do you follow, and which is most likely the true ph? With these 2 values, it's hard to predict an accurate CO2.

 

[jcarlilesiu]

You are probably right on the line. As far as CO2 goes... unless you have a massivly high KH, you don't have much CO2 in the tank at all.

 

[frostby]

I just added the CO2, maybe on the next test I can hope for a 7.4.... cross fingers...