Bderick67;2802194; said:Well assuming there is no large crack in the head somewhere the o rings are likely case. I pull mine off every once and a while and lube them with vegitable oil. Check to see if damaged or if they have an irregular shape. When you insert the quick disconnect assembly push down on it while working the lever, this will help seat it.
BTW the suggestion of a rubbermaid container is always a good idea. One other question you don't have your canister place some abnormal distance below your tank do you? The recommended maximum distance below water line is 55" more could cause leaking because of to much water pressure. I have experienced this problem, though not with a XP3 but an Eheim 2026
i'll check for cracks and other irregularities when i get home... hopefully the little guy will be ok w/o filtration, i should off plugged in the airstone!
the filter is about 34" below the water line... nothing abnormal w/ placement.