Help! I shouldn't be allowed to DIMyself

[tebriel]

Okay, so I filled up my refugium with saltwater, made sure everything was sealed tight and then started my pump. It works, water flows through the overflow box down to the refugium, back up the pump into the tank and it starts all over again. However, when I turn off the water the refugium keeps filling up until i plug the pump back in and it starts back up. What do I do? Is it the plumbing from the return line reversing flow and coming back to the refugium? How do I stop it if it is?

 

[tebriel]

Okay, the answer is yes, the flow is reversing and coming back down the return line. How do I stop this? Is there some kind of one way valve?

 

[tebriel]

dawgdude;107140 wrote: The easiest way is to the outlet at the top of the water ...

Thank you! I'm charging up my drill right now so that I can do this. :bow: