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ADA Pollen Glass Beetle (30Ø for CO2)
Pollen Glass Beetle has a wider diffusion filter. Unique design Beetle sits conveniently on an inside corner of an aquarium tank. For a large size tank, Beetle can be placed on multiple numbers of corners. 30Ø is suitable for 90cm size tank, 40Ø for 90-120cm tank, and 50Ø for 120-180cm tank.