I fermented an american wheat with Safale US-05 at 62 ambient temp. The yeast seemed to have dropped out by day 3 and their was basically no krausen formed other than hops sludge that formed about 2 cm high at the top for a day or so. I checked the fgravity readings 9 days in and they are at 1.009! Way lower than I wanted or expected without a krausen. Is this normal? I have never had a beer without a large krausen....