Three main elements are essential for the optimal growth of aquatic plants. These are nutrients, light and carbon dioxide (CO2). If unbalanced, the results are algae growth or the withering of plants. The introduction and use of CO2 in a planted aquarium allows plants to thrive and grow more efficiently, while also giving them the ability to out-compete algae for nutrients in the aquarium.

The In-line CO2 Diffuser by Ultum Nature Systems is an all glass accessory that dissolves CO2 into a fine mist of bubbles to allow for the CO2 to dissipate in your aquarium.  This particular glass bubble counter has the classic design that is sleek and slim that can be easily attached with a suction cup.  

Specifications

Comes in 2 different sizes to fit your hoses

Size	Fits Tubing (in)	Fits Tubing (mm)
12/16	1/2"	13mm
16/22	5/8"	17mm