Rhinox Spio III CO2 Diffuser & Glass Reactor - Compatible with Pressurized CO2 Tanks - Latest Technology Guarantees Optimal Diffusion of CO2 - Improves Growth & Health of Aquatic Plants CO2 DISSOLVES IN SECONDS --- With high surface area per volume ratio, Co2 can easily dissolve. KEEP AQUARIUMS PLANTS HEALTHY --- Improve the growth & health of your plants with sufficient Co2 supply! GIVE MUCH NEEDED CO2 TO YOUR WATER TANK --- Atomic pores on the ceramic disc efficiently breaks down Carbon dioxide into tiny streams of bubbles TESTED & IDEAL FOR BOTH LARGE & SMALL AQUARIUMS--- Experiments show Co2 dissolve rate close to 100% therefore, making it suitable for tanks about 55 US gallons (200 liters) WORKS BEST WITH PRESSURIZED CO2 TANKS --- Compatible with pressurized Co2 tanks with at least 2 to 5 bubbles per second injection rate, but not yeast bottles. Size: 1 inch in diameter.