A very accurate and cost effective way of understanding the kH value of your aquarium which is effected by C02 levels.

This solution (accurate to about 0.01ppm KH) can be used with all drop checkers and the solution is laboratory tested - this means no more guessing or being unsure.

We have already added bromothymol blue to this solution so you do not to add anything else.

Directions: Add a few mls to your drop checker, then pop the unit directly into your aquarium and wait to see the colour change.

This product should last at least two years.