I like to share, I didn't know the plumbing was going to work so far so good. Its a unuse sump so I decided to have it as a second Chaeto refugium, was debating rather to add Chaeto reactor. I found them too much work. The second refugium plumbing is tricky to get it working properly, a combination of water bridge and return pump did the trick. My nitrate is in 30's this should bring it down, I have a lot fish Tangs. I used have bio ball, nitrate was 0 but that brought with it more problem with Acro's and red slime. I have been running the 1 first refugium for more than year now love the out come, lower nitrate, no weird nutrient, chemical imbalances.