Hello! I purchased a used BH1000 in the summer and just got around to hooking 'er up! After about 2hrs running last night, the foam started rising towards the collection cup and all seemed well...I got home early this morning and it was still running nicely...Woke up this morning and its making those gargling noises---where the pump seems to make sporadic jolts to push the foam to the cup, but then falls down...Is this normal? I haven't opened up the air valve yet...should I? Sorry for the dumb questions but this is my first time time skimmer lol--thanks!
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