As promised here are some pics of my new defuser.


I've used the GL drum vent design but flow the liquid through the 15mm T'd off feed pipe into the 22mm,
the 15mm that goes through the 22mm is for fixing to the dome to via a tank connector underneath.
The end of the 22mm is belled out so it spreads the bio over the dome.
The dome is the top of a 3kw patio heater cut down to the right size.
I'm toying with the idea of using the 3kw element to heat the underside of the dome, but have concerns about being able to stop bio splashing up onto the element.