I thought I would use a kit to use in my spare carboy. I haven't used a kit in years but followed the instructions with an addition of 1 lb. of DME. I used Nottingham yeast. I decided to use 100% RO water and I think that was a mistake. This was the lamest fermentation I have ever had. Barely a 1/4" of krausen during the 12 days it fermented. It did get down to 1.016. It tasted like a yeast starter with hops. I assume I should of used regular tap water minus the chlorine. If it wasn't the RO water, what went wrong?