Maybe a little more understanding why it works for ppl and not for others.
It's just not like drilling a hole in your pump or sticking a wood air stone UNDER the return pump.
Also you want to run this on a timer during the night using either a air-pump with a wood stone diffuser under there or a solenoid if you go with a Mazzei Venturi attached to your return pump.
The reason EC is using a Limewood airstone is that it create about 5% of the Micronano bubbles, ceramic dics are better but they clog a lot.
Drilling a hole in your return pump isn't by far the same, it looks impressive though but not the same.
Meaning depending on pore size and shearing of the water and then the shearing again of the bubbles with a sharp edged impeller, you'd get even smaller bubbles, with the limewood airstone we are getting 45um to around 120um... with more being on a slightly larger size... those rise to the surface quickly and are eliminated from the dwelling... so far with me?
So what we are left with are the smaller sized ones that dwell for hours and sometimes days...
Even if we were producing 5% microbubbles per pass, 95% are rejected by bouyancy... 5% of the generation is still viable over time, the 5%'s add up and you get a hazy look, not a truly cloudy one.
The pictures taken on EC FB page and website are "in motion" so many hobbyists think that there's a ton of obscuring bubbles and the cloudiness didn't happen instantaneously... it was generated over a period of 30 minutes to an hour.
If you are taking on too much air, you'll notice a HUGE decrease in flow, if that happens, all you do is scoot the diffuser away from the intake.
Located the airstone or disc between the weir from the refugium to the return pump chamber... that way, once again, the larger bubbles are "taken out of the equation" and the truly suspended bubbles are caught in the high volume laminar flow in that water fall area and delivered to the return pump.
This also ensures NO SUPER SATURATION of air into the DT.
You want to create a soft and gentle is desired... loftly like a fog... and a cloud, not jet propulsion.
I hope this all makes sense.
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Like a bell!
We are trying to create a vortex in an inner chamber (that sits in an outer chamber) that shears the bubbles into smaller sizes and can get results of water cloudiness you mention, in about 15-20 minutes.
I think that's how far we we will get with that design unless we ramp up the pump pressure as the Japanese do with their nano-bubblers and add a ceramic nozzle on for good measure.



