Pollen Glass is a CO2 distributor, which virtually pollinates the entire aquarium with tiny carbon dioxide bubbles. Pollen Glass is hand made from high quality Japanese glass. Its form is designed for use in a standard size 60cm aquarium (approx 20 Gallon) or under.
Larger than 120cm Tank (Beyond 75Gallon)
*Generally use 30mm. for 90 cm standard aquarium (approx 50 US Gallon), 40mm. for 120 cm standard aquarium and 50mm. for larger aquariums.
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