I turned the lights off on the tank yesterday to get rid of the cyano. Will keep it going for a few weeks.
Saw the tank again for the first time on Saturday. Not much has changed. The glass on the sides is mostly clear and one of the rocks seems to be free of cyano, but the rest of the tank is still totally coated. Diatoms still forming a brown film on the surface, which I removed, but will grow back in a few days. Both snails still alive and healthy. Shrimp seem healthy and active, I saw one that was berried.