In purpose Andrew or just a malfunction?
99% sure on purpose. A lot of reefers are running their skimmer less and less.
Honestly, I've seen some GREAT sps tanks run without a skimmer... All that gunk is free floating coral food, and skimmers were invented in the era of 0 phosphate and Nitrate is a good thing -- Those days are dead. And skimmers may be gone in 8-10 years for all we know.