Dymax Crystal Co2 Indicator - Large

Monitoring co2 levels in your planted aquarium is very important for the health of your plants and fish. This kit includes a high quality CO2 Drop Checker and suction cup. Indicator solution sold separately. Small: 5.5cm L x 2.3cm W x 4cm H approx Large: 5.5cm L x 2.7cm W x 4.5cm H approx