Hello, this is a new build using Prostar Rimless 150. On one of the two returns from aquarium above to sump below, it is leaking. I’m hopeful it’s just o-ring? But I cannot figure out how to unscrew this piece? It came pre-assembled from factory with these 3 shorter pipes screwed in and I just screwed in plumbing below. Any idea why this is happening and how to fix it? Thanks.
Edit: I’m not sure why videos aren’t uploading. Added picture.
![IMG_2432.jpeg IMG_2432.jpeg](https://www.reef2reef.com/data/attachments/3594/3594736-052d4d3e4642f722ba423d1f10193a39.jpg)
Edit: I’m not sure why videos aren’t uploading. Added picture.
![IMG_2427.jpeg IMG_2427.jpeg](https://www.reef2reef.com/data/attachments/3594/3594733-8dc7868ecf925026588c9e8091c53562.jpg)
![IMG_2432.jpeg IMG_2432.jpeg](https://www.reef2reef.com/data/attachments/3594/3594736-052d4d3e4642f722ba423d1f10193a39.jpg)