Ferment @18C, raise to 20C post fermentation (2 days with no gravity change, usually fine by day 7 or 8) for rest phase.
Massive dry hop or 210g (70g each of Citra, Riwaka, and Superdelic) on Day 4. SG before DH was 1.011.
The dry hop seems to cause a lot of activity, likely the change in pressure from opening the lid, and nucleation sites created by the hop particles allows some CO2 to gas out, mixing things up as it goes.
SG fluctuates a little, and in this case went down to 1.008, then back up to 1.015 where it settled.
Day 6 SG dropped by 2pts to 1.013.
FG 1.009 7.0% 19L bottled.
Est max 1.011 minus potential 6pts, 1.005, 7.5%.
Need to degas earlier to help prevent movement of trub near end of siphon.