Venturi Intake?

[ShawnInfirmity]

So I was going back through my pond related purchases on Amazon and noticed this graphic that shows a "venturi intake" when the pump is being used as a submersible pump. What exactly does this do? It seems like the air that was pulled through the venturi would only be on the output side of the pump or am I looking at it wrong? Also, If i have my pump submerged but have an external pre-filter on it should I be using the venturi intake?

 

[Mmathis]

Good question. Only time I’ve used a Venturi was for my Skippy. But it was through the water pipe as it was going into the tank and not connected to the pump. It was just a DIY way to add O2 to the filter media. Not sure it did any good.

 

[Angel]

venturi

adds air aka oxygen to the water stream it can be added in most situations. To late at night to take a picture of what i did prior to my pump lose during winter but i can explain it with the picture. also it was a dyi

 

[sissy]

lots of video's on youtube for this and a ponder on here does them also .They really add a lot of oxygen to the water and that cuts down on algae growth