I got a Red Sea Reef setup two days ago. Last night it started making gurgling noises and I noticed that the water was extremely low in the overflow tank and excessive air bubbles were in the main tank. It was very noisy. I had to turn off the power because I was afraid I would burn out the pump. Does anyone have any idea about what may have happened? Also I am new to this hobby and only know how to clean the filters and empty the skimmer. I am unfamiliar with the other components attached to the sump. I’m worried about the fish and coral.