Aquarium CO2 Drop Checker (monitors CO2 levels) - Aqua

The Neutro Drop Checker is designed to indicate the amount of CO2 in your planted aquarium. In order to understand the CO2 level, a colour change occurs within the drop checker. Drop checkers are the only way to monitor CO2 levels on a daily basis with high accuracy. This drop checker requires Neutro Bromo Blue solution to work and needs to be purchased separately.

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