I'm confused with my refugium right now. The water in it was level with my main tank before I did a waterchange. After I did the water change, it's water level is much higher and it also spilled one time. So I think I need to adjust the flow of the pump. But when it's working it's great.
I will take a picture and post it soon!
I'm goign to try and make a protein skimmer for my tank like imisky's too