SaltyDawg

Hello, I've recently started a 125L marine tank to keep corals and a few small fishes. Tank is still cycling. I'm totally new to the hobby (marine) but not to fish keeping. Anyhow, I've recently added a Skimz SH1 protein skimmer. This skimmer is producing lots of microbubbles - LOTS. At first, the microbubbles pour out from the small hole at the back of housing and the gap where the airline hose and power cord enter the skimmer housing. I've since applied silicon to cover the hole and gap but now microbubbles come out from bottom of the housing despite the foam pad. This is my first ever protein skimmer so I may be using it wrong. I saw a Youtube video of this skimmer in operation - it was totally different from mine i.e. the bubbles are confined to the cyclindrical tube within the housing. Please advise if you know how to resolve the problem. I would hate to replace this skimmer when it hasn't rendered any service to me. In the meantime, I'll let it run for a few days and monitor the situation. Thank you.