check valve will not work. I noticed that this thing leaked water the day after it was installed. Luckily it only leaked a few inches down the tube and the CO2 was able to push it back out so it didn't damage anything. Turns out my Neo Diffuser still has a built in bubble counter. Get this instead!
Aquael Fan Filter Mikro Plus
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KEDSUM 330GPH Ultra Quiet Submersible Pump With High Lift And Grounded Power Cord - Ideal For Fish Tanks, Ponds, Aquariums, Statuary, Hydroponics - Includes 3 Nozzles And 1500L/H Water Flow
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Humidifier / air purifier "Fanline Aqua VE400" with an ionizer, with a capacity of 410 gr/h
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Powerful And Quiet Submersible Pump For Aquarium, Pond, And Hydroponics: KEDSUM 660GPH Pump With 6Ft High Lift And 3 Nozzles
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Steam cleaner Deerma Deerma DEM-ZQ610 EU, white/red
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𧲠Efficient Magnetic Fish Tank Cleaner: KEDSUM Floating Clean Brush with Handle Design
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Vacuum cleaner TEQQO Aquastick 3 in 1 Power, grey/turquoise
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Efficient 2-In-1 Magnetic Fish Tank Cleaner With Non-Slip Design And Scratch-Free Blades
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