hey im making my fuge atm n i was wondering if this would have too small of hole to allow the good stuff back to the tank pod and ect noob thing lol pods are microscopic
Click to view attachment right?

I wouldnt use it.

whys that? only thing i got atm

Is this an in tank fuge? If so it would be fine. I am always thinking about under cabnet fuges and I could see an overflow issue. My mistake.

hang on fuge.... im useing if were the part flows back into the tank to stop stuff floating away

Should be fine. Just set it a little lower than the level that would overflow the HOB so that is would have a bit of space to flow over if it got cloged up with crud.

Tanks all done now the wait for 7 days before the sealant cures!

hmm i tryed it out on my little test tank and the flow has to be on very low other wise it other flows... do i need high flow ?

Nope. the slower the flow in a fuge the better. Its more contact time not the amt of flow through water that is good for a fuge.