Powerhead SAND Venturi. Help please

[Miami Reef]

I’ve been dealing with this issue for a while!

My powerheads make a Venturi with the sand. It sucks a literal stream of sand, like a tornado.

The sand looks like this when it is getting sucked up in the powerheads:

My powerheads are STRONG. I need the extra flow for my tank.

A venturi happens on both sides of my tank. It happens every 30 minutes, and makes the tank look really dirty.

What’s the solution?


Here is a picture explaining what happens.

It tends to happen on the back powerheads on both sides of the tank. I have 2 powerheads on both sides of the tank.

 

[fishguy242]

Move them up a bit ,point them back to current flow direction ?

 

[Miami Reef]

Move them up a bit ,point them back to current flow direction ?

I tried putting them higher, but then there’s a venturi that comes from the surface of the water, causing microbubbles.

Not sure what the “point back to current flow direction“ means.

 

[Miami Reef]

I just tried raising the powerheads as high as I could, and it triggered another sand venturi. I got it in video. I can not make the powerheads much higher. Please help me.

https://youtube.com/shorts/Cov0v-NSOQ4?feature=share

 

[fishguy242]

I tried putting them higher, but then there’s a venturi that comes from the surface of the water, causing microbubbles.

Not sure what the “point back to current flow direction“ means.

Try slightly adjusting direction of powerhead downward ,with the new raise in height ?