but again, the Prizm skimmer isn't that great. I have one...at least until 5pm..then it gets replaced by the cpr bak-pak 2 that UPS should deliver in the next hour.
as far as break-in periods...the skimmer should be able to skim something almost immediately, if there's anything to skim. But the slime coat that builds up in 2 weeks within the skimmer is what should help reduce the micro bubbles.
Also, per the Prizm instructions, micro-bubbles tend to indicate you have too much flow...try dialing it down a smidge, for a couple hours.