Hello, I am brand new to the forum. I joined because I am getting back into the saltwater aquarium hobby after being out of it for two decades. I figured I would start small with a Biocube 32 gallon. I am looking for clarification for the filtration chambers in the back of the tank. Before turning on any pumps, I filled the display tank with RODI water. Then I noticed all three filter chambers in the back of the tank were filled with water as well. I thought the first chamber would fill up and overflow into the the second chamber and then into the third chamber with the return pump. If someone could please clear this up for me I would greatly appreciate it. Thank you.
