rjordan393

Hello,
The instructions say to fill the top chamber half way with #4 standard and add 2 to 4 drops of pH indicator until a clear blue color appears.
I got a clear blue color after one drop and did not add anymore. Would this make a differance in the CO2 reading from blue to green?

shaman

No. You can add more drops for more intensive color for better reading

rjordan393

Thanks,
I removed the contents and added 2 drops to the standard #4 and also replaced the referance fluid. I just wish they designed the checker with a vent to make it easier to fill. Its such a pain to do it. I have a dual bulb checker from Greenleaf Aquarium.