The Fluval Ceramic CO2 Bubble Counter is ideal for use in planted nano aquariums, including Fluval"s Flora Aquatic Plant Kit, The Fluval CO2 Bubble Counter is a replacement part for the Fluval 88 CO2 Diffuser, The diffuser helps to effectively dissolve CO2 into your aquarium, while the Fluval CO2 Bubble Counter provides accurate monitoring of the CO2 dosing, The Fluval Ceramic CO2 Bubble Counter Features and Benefits:, - Ideal for use with the Fluval Flora Aquatic Plant Kit or other planted aquariums, - Provides accurate monitoring of CO2 dosing, - Helps ensure a healthy living environment for your fish, - Replacement part for the Fluval 88 Ceramic CO2 Diffuser, SKU: RCHG0696