KH Standard / 4 dKH - 250 mL

KH Standard / 4 dKH (lab certified analytical standard 4 dKH) can be combined with pH indicator (Bromothymol Blue) to create the necessary and appropriate solution for use in the drop checker to accurately measure CO2 levels in the aquarium. The KH standard / 4 dKH needs to be combined with 2 - 4 drops of pH indicator in your drop checker until a strong transparent blue color is achieved.

• Lab certified analytical standard 4 dKH.
• For use in a drop checker in combination with pH indicator (Bromothymol Blue).
• Size: 250 mL