Nutrafin Co2 How Do You Know Its Working

[Fighterfish]

I ahve got my nutrafin co2 system but i can't tell whther or not it is working. Can anyone help?
Thanks

 

[EliteFishy]

Can you see the bubbles on the ladder? If you can than its working.

 

[Fighterfish]

There are 4 or 5 bubbles that i can see. I am not sure whther they are trapped oxygen or co2.

 

[Fillet 'O' Fish]

They should be moving not trapped
The bubbles should slowly rise up the ladder, getting smaller as they rise.
Do you have a bubble counter between your CO2 cylinder and ladder?
If so, how many bubbles per minute?
If you get yourself a co2 test kit you will see when you have reached optimum Co2 levels in the water.