BPS too slow to diffuse co2

[Abarth_1200]

I've just finished rescaping my community tank, and plumbed in my co2. Using a fire extinguisher, fzone 2 stage regulator, co2 supermarket ancillaries including low glass diffuser and check valve.

The problem i had yesterday was the slow 1BPS didn't seem like enough pressure to push any co2 through the diffuser. Given I have a 60L tank 1 BPS is maybe going to be too much.

Any ideas? Is there such a thing as a more accurate needle valve, I touch the dial on this one it goes from 1 bps to 20!

Question on flow of tank, filter draws at right rear and inlet is spray bar top left spraying down and along the bed of the tank. I appreciate it doesnt create a circle of flow as such but it does create flow from one side to the other. Should I move it to the same side as the filter draw?

 

[Abarth_1200]

Turns out it was the cheap check valves. Both blowing co2 where they are glued together. Lucky I had a spare from my airline tubing.

 

[ChrisK1993]

Turns out it was the cheap check valves. Both blowing co2 where they are glued together. Lucky I had a spare from my airline tubing.

You shouldn't use air line check valves on co2 setups, the co2 eats through them.