Sourdough Starter Day by Day Photos
If You're Making a Sourdough Starter For the First Time, Here's a Daily Guide in Pictures
6
This is what the top looked like in the morning of day 3 before it was fed. When you stir a starter that has risen up like this, it'll deflate and have a light, airy "honeycomb" texture. (But just remember, this isn't a strong starter yet, it still has the smelly bacteria making it look like this.)
What you're aiming for, eventually, it a predictable rise and fall every 8-12 hours. You want to feed it "at the top" or just when you see streaks that show it's starting to fall. That's when you know you're on the right track.