Similar problem I had with Coralife only it would not skim for week. One time it did over the weekend and went nuts causing my waste bucket to overflow dumping about 15g water on my floor.I honestly like how Reef Octopus Classic 1000 HOB works, its just I can't sims to adjust cup...
It works once, 5 days later it's full, I empty reset and not it's full in 2 days