Drop Checker Solutions
4.2 dKH solution only:
8.4 dKH solution only:
Green color indicates between 25-30 ppm (for 4.2 dKH solution) (and 50-60 ppm for 8.4 dKH) levels ideal for plant growth
Blue color indicates lower levels of CO2; CO2 injection can be increased gradually until the indicator solution turns green.
Yellow indicates high levels of CO2 that can be harmful to livestock, if the solution is yellow lower the CO2 injection and check the solution every few hours until the color is green.4.2 dKH measures normal and low range CO2 levels.
The 4.2dKH solution will turn green at 30ppm dissolved CO2, and the 8.4dKH solution will turn green at 50ppm dissolved CO2.