You should use 4dhk distilled water not aquarium water.
Not just distilled water. The point is 4dkh water.ROFL...Wow...At least noobs provide entertainment!! Okay, I'll try the distilled water!! hahaha
I'm curious? In the picture you have at the start of this post the DC looks yellow indicating that there was lots of CO2 or the water you used as very acid. Is your tank water very acid?Okay...got the drop checker working now.
Obviously my current rio50 co2 reactor sucked because the checker stayed blue but I took the tube out of the reactor and put it on the top of my penguin power head to put a spray of co2 through the aquarium and it looks like it did a better job at dispersing. My checker turned green for the first time! Not I just need to put something together that will be more efficient than spraying it out a power head.
Thanks for the help guys