Two functions design, CO2 bubble counter and check valve.
Accurate CO2 bubble reading.
Good quality silicate material of check valve avoids backflow
ISTA - Top Quality Planted Aquarium Products A Taiwanese brand that is committed and focused on product efficiency and quality. Aimed at the segment of planted aquarium, their products are of high performance and will allow any aquarist to reach great results with lush plants. "We are optimistic and anxious in the expansion of this brand into the market. Not only the efficiency of their products is impressive; but the whole appearance of their products will inspire you to create a Natural Aquarium".