Aquarium Water Treatment -Carbon Dioxide Atomizer Highlights Generic Brand Carbon Dioxide Atomizer Description: Glass CO2 diffuser, durable and stylish, adding a beautiful decor to your aquarium. This item will quickly dissolve carbon dioxide (CO2) in your aquarium or tank. High carbon dioxide diffusion efficiency, easy to install and operate. Helps ensure plants receive proper amounts of CO2, improve your plants' growth and health with sufficient supply of CO2. Suitable for use as a decoration or provide a good source of ventilation for the tank or aquarium. Specification: Material: Glass 20 Gallon-Round Size: About 7x5x2.5cm/2.76x1.97x0.98inch 28 Gallon-Round Size: About 7x4.5x2.5cm/2.76x1.77x0.98inch 28 Gallon- 3 rounds Size: about 12.5x8.5x3.5cm/4.92x3.35x1.38 inch 28 gallon-5 round Size: about 12.5x8.5x3.5cm/4.92x3.35x1.38 inch 28 gallon- 8 rounds Size: about 13x2.7x3.2cm / 5.12x1.06x1.26inch Package includes: 1 piece CO2 diffuser 2 pieces suction cups Note: To avoid breakage when removing the tube, do not remove the tube from glass factory. Instead, carefully cut the tubing along the length of the fixture to release the glassware. Mount your diffuser using the suction cups. It should be positioned low in the aquarium. When removing or repositioning the diffuser, pull on the suction cup(s) rather than the glass to avoid breakage.