xtlosx
Just Reefin'
Personally I'd just clean it, leave it alone and not change anything for a week. Nothing good ever happens quickly.
I am at that point as well... This thing was a work horse for 2.5 months until last Saturday..... The only thing I can think of is last week my son was sick, as was my Wife and last Saturday I cleaned out kitchen with bleach.. the spray stuff... I showered afterwards, cleaned my hands several times, and replaced a nori sheet at night...
I'm wondering if there was the slightest bit of residue that killed whatever was good on the skimmer and started from scratch? It's not like I just took bleach and dumped it in there, but heck that's all I can think of.