I'm still having issues with this skimmer overflowing. I have been cleaning it regularly and keep the venturi clean of mineral/calcium buildup. The water level is always the same and I do not add any supplements. I cleaned it about 5 days ago. Last night there was about 1/2" of skim in the cup. I came in today and the cup was full of water and overflowing! Every bit of polution just dumps into the tank. Not good. Does anyone else have a similar issue with this skimmer? I'm frustrated and thinking of trying something else.