instrustions: first, you need to turn the drop checker the other way up, add 4 drops of solution and I added enough tank water to fill the bubble half way. while you turn the drop checker right side up you’ll place it on your aquarium. you don’t have to lower the water on your tank. it takes a few hours to start out working. while you changed tank’s water, pls change the liquid.
Monitors levels of CO2 & PH in aquariums.
Ensures fish and plants live in a healthy environment.
Manufactured from glass, for optimum reliability.
Provides accurate dosing of CO2.
Easy reading with color chart.