I successfully SLAM'd the pool last week.
On night 1 of the SLAM, FC went from 14 to 3.5. On night 2, it went from 34 to 33.5, which was a success.
I left the SWG off for ~3 days in order to allow the FC to drop. Once it was ~8-14 (I can't remember exactly), I turned the SWG back on at 60%...