Alot of epoxy will do this. Doing a water change wouldn't hurt by any means.
I would just turn the skimmer back on and let it do its thing, it should calm down soon. You could just let it run with the cup off or if theres a drain plug on the cup you could remove it.
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75 Gallon RR | 20 Gallon Sump | RKL Level 3 | 2 x MP10 ES W | Octopus Skimmer | 2 x 250 Watt Halide | 18 L.E.D's | AquaEuro Chiller | Sicce Pumps
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