Aquatic Aquarium CO2 Glass Drop Checker

Features:
Maintaining proper Carbon Dioxide (CO2) levels in the planted.
Aquarium is one of the important factors in the health of the planted aquarium ecosystem.
A CO2 drop checker is an essential tool for monitoring CO2 levels in the aquarium.
The CO2 drop checker is a reservoir designed to contain an indicator solution and an airspace.
Long term monitor CO2 the color show: blue - insufficient CO2, green - sufficient CO2, yellow - excess CO2.