I have been drinking several batches of a Czech pilsner recipe I made. I used Bru'n Water to adjust my RO water using their Pilsen water profile. I have always used 5 oz of priming sugar when I bottle. The last batch was over carbonated and I think the previous batches were well carbonated. I now have several batches in the pipeline of an American lager. I used Bru'n Water to adjust my RO water using their American Lager water profile. With this water profile I use significantly more water additions, about 3x more. The current batch is rather flat and I sampled some of the newer batches and think they are going to be flat as well. I didn't do anything different between the Czech pilsner and the American lager other than the malts and hops and the water additions. Each batch spent about a week conditioning at around 70F before going into my garage where it's about 50F to 60F for at least 3 weeks. Does anyone know what the problem could be? Thanks.