Corner Overflow

[urbanjaybird]

I have a 75 gallon with a built in corner overflow. The overflow has previously had both the knock out pieces removed to run the return line over it. I currently have it plumbed with the return now coming over the back glass. My problem is now with both knock outs being removed, my fish keep finding their way into the overflow. Has anybody found any way to plug those back up with anything that would help keep the fish from getting through?

 

[HankstankXXL750 Verified Sponsor]

I have a 75 gallon with a built in corner overflow. The overflow has previously had both the knock out pieces removed to run the return line over it. I currently have it plumbed with the return now coming over the back glass. My problem is now with both knock outs being removed, my fish keep finding their way into the overflow. Has anybody found any way to plug those back up with anything that would help keep the fish from getting through?

I got a pvc threaded female end and a male threaded plug and screwed them together to fill mine as I did the same thing to have an emergency overflow.

 

[urbanjaybird]

I got a pvc threaded female end and a male threaded plug and screwed them together to fill mine as I did the same thing to have an emergency overflow.

Would you happen to have a picture?