Thanks for keeping us updated. Sorry to hear about the frogs
I always feel bad when I find DOAs in my pool. How does the third step look?
Visibility is slightly improved. I think that given the amount of contaminants and the limitations of sand filters, it's a long process. When one discovers that number of frogs turning up after over a month of chlorine you know you have issues.
The stairs are looking more blue then last time.
You are doing great!
In my pool, mature frogs can survive forever...little frogs, not so much.