Corallife 300 cone skimmer

[viperfish]

Take a close look at the amount of buildup on the neck of the cup. Some skimmers will build up a very thick coating on the skimmer neck and after a few day a large chunk will fall back into the skimmer and the skimmer overflows because of the large amount of DOC's hitting it at once. If this is the case you just have to clean the collection cup more often.