I've been dealing with this every time I clean the filter. But this last time the bubbles wouldn't stop. They had already replaced the filter a year ago when it began leaking. I called them and they instructed me to use silicon lubricant on all o rings including the big one that goes around the head. They also told me to make certain the hoses were very secure on the intake and output connectors. I put silicon lubricant on those too and tightened them very firmly. My problem has not since gone away. I am calling marineland again tomorrow. I'll let you know what they say.
Last edited by Rickyb2112; 11-20-2012 at 12:38 AM.