Description:<br /><br />Aquatic CO2 Test Kit Glass Drop Checker PH MONITOR Fish Tank<br /><br />\u25cfMaintaining proper Carbon Dioxide (CO2) levels in the planted aquarium is one of the most <br />  important factors in the health of the planted aquarium ecosystem. <br />\u25cfA CO2 drop checker is an essential tool for monitoring CO2 levels in the aquarium. The CO2 drop<br />  checker is a reservoir designed to contain an indicator solution and an airspace.<br />\u25cfWhen the drop checker is submerged in the aquarium， the carbon dioxide will outgas from the <br /> aquarium water into the airspace of the drop checker and will eventually be absorbed into the <br /> indicator solution. <br />\u25cfThe carbon dioxide gas will seek a point of equilibrium between the indicator solution and the <br /> aquarium water. As equilibrium is achieved， the color of the indicator solution inside of the drop<br /> checker will change based on the concentration of CO2 in the aquarium water.<br /><br /> <br />Specification:<br /><br />\u25cfTurn drop checker up-side-down<br />\u25cfPlace several drops of test solution into the drop checker.<br />\u25cfRefill aquarium water to the level line.<br />\u25cfVolume of test solution and aquarium water， 1:1<br /><br />Package Includes:<br /><br />1 x  CO2 Glass Drop Checker