skimmer making a wopping sound all in a sudden

[KevinK]

as it mention's, my skimmer started to make a wopping sound, like wop, wop, wop.

locking at it, I cant se any mayor defects, still foam in the neck and so,

so I was gust wondering,

- is it coused by a slight water flow proublem into the skimmer

ore

- is it coused by a slight air restriction into the skimmer

so bothe in the volture air/water mixing part, but what ?


it is a JNS shark5 in a 100 gal. tabel like set up, with a steady 10 inches of water in it


as big as the table is, as odd I placed the skimmer, and it is a bit of a pain to get to the skimmer pump, so before I go and do the hassle, might be worth to know where to lock at the pump, as I dont want to start taking it out, back in, out back in again.


input ?