The Planted Tank Forum banner
1 - 1 of 1 Posts

·
Registered
Joined
·
2,317 Posts
That little funnel thing is necessary, it's how the product works.

The whole reason a Venturi works the way it does (python water changes, air intake for powerheads), is that when a fluid moves quickly, it exerts less pressure (I think it's something related to something some Bernoulli guy talked about (I skipped this part of physics...)). This has the effect of creating negative pressure on the side inlet, and effectively 'sucks' water out of the tank.

I've seen a couple DIY versions out of various plumbing parts, but I think it would take quite a bit of work to fabricate something like that, and I'm not sure it would get much cheaper then just buying the venturi part.
 
1 - 1 of 1 Posts
Top