Functions as a CO2 bubble counter, check valve, and diffuser in one unit.
Compact in size and easy to install.
Ceramic diffuser piece ensures an even distribution of CO2 in the aquarium.
Convenient suction cup mounts to side of aquarium, and airline tubing holder keeps the unit neat.
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Simple and reliable diffuser Review by Duncan
Quality Price Value
Worked well for 7+ months but disintegrated when it was time to clean it the second time around.
The thread and cap has cracked into many pieces and broke into shards...
I believe acrylic is reactive to co2 so Ill be looking for glass or stainess shortly... (Posted on 4/23/2017)