62G Starfire Reef [40x18x20]

[JDigital]

Originally Posted by sphelps

Check was happens during a power cycle. If your sump level rises during shut down and everything turns back on at the same time, the short time the skimmer runs at the elevated level can sometimes be enough the fill and overflow the cup, once full it just continues to bubble over because of the lid extension. So a brief power cut could explain such skimmer issues.

Definitely a possibility! I know just from switching off my power bars for water changes that the sump rises. I suppose with all the construction in my area there is a likelihood of power being cut briefly, although it NEVER happens when I'm actually home . Thanks Steve. I'm not sure my Reef Keeper Lite tracks power outages like my Apex at work though. Will have to check that out or upgrade.