- Easier to read:
Other Drop checker kits may be hard to read. This is why we include the optional darkening agent, which you can add to the premixed indicator solution to make reading easier in high light tanks or tanks with dark backgrounds.

- Easier to use:
Comes with pre-mixed indicator solution, pipette, and suction cup. Fill the glass chamber and place in tank. Wait about 30 minutes for the color to fully change.

- Do Not add tank water into the drop checker chamber.

- Pre-Mixed 4.2 dkh solution included, (Green at 30ppm dissolved CO2)
By keeping the drop checker solution near green at all times, aquarists can ensure optimal plant growth while keeping fish and livestock safe.

The kit works by changing color as CO2 levels rise and fall. Too much dissolved CO2 can be harmful for fish and livestock. With this kit aquarists can accurately measure optimal CO2 levels that promote plant growth while helping to keep fish safe.

- Included in 4.2dKH (Single V2) Kit:

- 1x Glass drop checker
- 1x Suction cup
- 1x 1 oz. Pre-mixed indicator solution 4.2dkh
- 1x Flexible pipette
- 1x Optional darkening agent
- 1x Instructions

• Glass drop checker with pre-mixed indicator solution, suction cup, and more
• 1oz bottle indicator solution, 4.2 dKH, to measure CO2 content, (Green at 30ppm), Indicator solution comes pre-mixed at 4.2dKH with reagent mixed in
• Flexible pipette and instructions included, Optional darkening agent included
• The optional darkening agent can be used to darken the solution as desired, this means more accurate and easier to read measurements especially for tanks with high lights or dark backgrounds
• The indicator solution will turn from Blue to Yellow as dissolved CO2 levels increase