Going from two feedings a day to a single feeding?
After having some problems with my starter staying in the fridge for a periods and getting some off smell and flavours, I started a new starter (using Hamelman's method) which has been making great bread. I feed it twice daily, with 15g old starter and 50g flour (half white / half rye or other whole grain) and 60g water, so 13% prefermented flour in feedings. It peaks at about 10h and then around 12h I give it another feed when the peak has slightly fallen down. I typically use room temperature or slightly warmer (30C) water.