Co2 bubbles on water surface

[prime]

Hi,is it normal to have lots if co2 bubbles on surface whenever my co2 in 'on'? Thanks

[Urban Aquaria]

Are the Co2 bubbles rising up and staying at water surface? Or are the bubbles created from surface agitation due to water movement?

Lots of Co2 bubbles rising and sticking or popping at the water surface indicates that your Co2 diffusion method isn't efficient, so most of the injected Co2 is wasted. Try to get a better Co2 diffuser which can create smaller Co2 bubbles and adjust your filter flow path to circulate the Co2 bubbles down towards the substrate across the plants.

Ideally the Co2 bubbles should stay suspended under the water for as long as possible to maximize diffusion into the water column.

[prime]

Sorry..... UA I meant.

[prime]

Thanks UA.I'm using overflow with sump. I put my co2 diffuser at the pump inlet so co2 will travel with return flow into tank.maybe I'll buy a reactor for better diffusion.

[milk_vanilla]

Usually co2 bubbles trap in water surface due to biofilm, can't expel out to the air. But you use sump, very unlikely the case. Hmmm


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[prime]

That's why I puzzle.