1. Add 5 drops of CO2 test solution to the Test Vial Fill Test Vial with aquarium water to the Water Level Line.
2. Cover Test Vial with Bottom Stand. Once securely connected, rotate CO2 Long-Term Monitor upside down.
3. Affix the CO2 Long-Term Monitor inside the aquarium, approximately 4 in (122 cm) below the water surface.
CO2 LONG TERM MONITOR