I have an 'Authentic IPA' (Coopers website recipe) on the go - Coopers IPA can, 1kg LDM, 500g dex, US05 yeast, 20 litres.
It's 10 days in, FG has dropped from an opening 1054 to 1009 (stable reading for couple of days).
But the krausen hasn't collapsed, is still 2-3cm thick and up to 5cm thick...