Split a 5 gallon kolsch yesterday... kegged half, and added grapes to the other half. I was expecting much more activity than I have seen so far on the grape side, hence the headspace.
which ECY? I was able to get an ECY03 batch down to about 1.000 ;)
I think you should give it some more time, 5 days just feels way to early for that yeast.
10gallons of a citra blonde base. 5 gallons got US-05, and 5 got kolsched with WLP-029. I am probably going to fruit one of them as well just to make them even more different.