Sounds like that will be a pretty good beer, no worries on the krausen. Let that thing ferment and leave the temp alone...it's in a good range for a Belgian Strong. Once that krausen has been gone for a few days, then you can try a hydrometer reading.
Something is always fermenting....
"It's Bahl Hornin'"
Kegged: Sour Saison, Pale Ale, Aggie Ale, Firestone DBA, De Koninck Blonde
Bottled: Belgian Quad (Grand Reserve), Derangement (Belgian Dark Strong)
On Deck: Pliny the Younger