I did a 12g water change about 30min. ago my tank is a 50g cube and I forgot to shut my skimmer off which the collection cup was half full.As I was syphoning the 2nd 5g jug Ilooked down to notice my skimmer was overflowing and dumped everything from the collection cup into my sump:cry:.So far all my sps look good with polyps still extended no visual malfunctions,was this a waste of a water change?Has this ever happend to anybody here,and if so what was the outcome?