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The eheim has been adjusted and bubbles are small enough. Thanks for guidance.

Ed, thanks for the guidance. What's the logic behind mainly nitrogen bubbles? I wanted smaller bubbles as the tank is small and to disturb surface a little to break up slight surface scum and improve O2 exchange in water given there are shrimps in there, ps and I love the diffusers so aesthetic...

Adjusted. Much happier. Thanks for pointer.

Yep read about those last night. Will look into when I am near my Lfs again.

Adjustable? Jumps out of bed to investigate.....

I suspected so,thanks for confirming ian. Had an eheim one on there which produced massive bubbles, added air stone which gives smaller bubbles, ask I suppose is what Lphr do I need to create enough pressure to drive a diffuser?

Trying to get tiny O2 bubbles in my nano shrimp tank. Just hooked up my ceramic diffuser to my airpump and no joy no bubbles from the diffuser. Any suggestions? Bigger airpump (120l hr at the moment) or best to go for a nano diffuser?

agree its the bet place for it. Suggest trying to ensure your diffuser provides very fine bubbles. I have been running an eheim air diffuser for O2 injection to help the shrimps and the bubbles are too big. i ran it in sump area and the pump made an absolute racket. I have a co2 diffuser in the...

I'd say so.

yep good idea shouldn't be too much hassle (famous last words),

You star thank you. Now to see if the old man has one.... Do you know whether the spring definitely is behind the pin screw?

Hi looking for some help i am getting alot of buzzing from my solenoid when its on. I'm stripping it down at the moment as i believe its probably the spring that needs retensioning and i think the spring is inside the metal casing of the solenoid - any suggestions what tool i should be getting...