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Quantity
1
The UNS Drop Checker is a valuable tool designed to monitor and assist in maintaining optimal levels of CO2 in a planted aquarium. Drop checkers provide visual indication of CO2 concentration within the aquarium by changing color based on t...
Reviews
4.8
21 ratings
5
4
3
2
1
Love this
Works like a charm
N
Nickilas · May 28, 2026
Looks very clean, works well.
T
Tanner · February 20, 2026
Nice CO2 Checker
Looks clean and works well, easy to access and won’t get knock off in tank like suction cup checkers.
