The most accurate and cost effective way of understanding the KH value of your aquarium which is effected by C02 levels.
This solution can be used with all drop checkers.
In order for this solution to work correctly, it requires Bromothymol Blue / CO2 Indicator Solution which reacts with the 4dKH solution and changes colour according to the amount of C02 in your tank.
How to use solution:
- Fill in 4dKH solution from the bottle in to your drop checker.
- Add 3-5 drops CO2 reagent into drop checker (CO2 reagent is NOT included in the package).
- Place CO2 drop checker in to aquarium approximately 15 cm under the water. It should start indicate CO2 level after ~2hrs.
- 1 x CO2 drop checker 4dkh solution 100ml.
When the drop checker is submerged in the aquarium, the carbon dioxide will outgas from the aquarium water into the airspace of the drop checker and will eventually be absorbed into the indicator solution. The CO2 gas will seek a point of equilibrium between the indicator solution and the aquarium water. As equilibrium is achieved, the color of the indicator solution inside of the drop checker will change based on the concentration of CO2 in the aquarium water.
If the indicator solution is green in color, then appropriate levels of carbon dioxide exist in the aquarium, and no action is required. If the solution in the drop checker changes to blue or yellow, then the CO2 levels in the aquarium are too low or too high, respectively.