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Rhinox CO2 Bubble Counter

2Hr Aquarist Commentary: Bubble counters are useful for checking the flow of CO2. This model comes with an in-build check valve.

Note that this is a 3rd party product sold on Amazon that I have used or have experienced to a degree that I'm fully comfortable to recommend. If you do buy the product through the Amazon link below, I do earn a small commission (at no extra cost to you), which helps in the running of this website.

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