If you are serious about a planted aquarium THIS IS A MUST and ZERO CO2 emissions reach the surface from the bubbler in the tank. Bubbles per minute due to exhaust gas reaching the surface. With this device it is 100% absorbed! I have a VERY heavily planted 100 gallon tank and my CO2 is set at 60 bpm and more than enough. So why 2 stars? After a few weeks of work, the rattle and rumble finally got to me and it's coming back. The mechanical motion of a spinning wheel is endless and destructive. There is a cheaper and quieter solution, e.g. B. Install a non-filter water filter under the sink, drill a hole and add a CO2 line and you're done!
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