10 June 2024 Bucket challenge

The setup/environment:
6 buckets each with a scent tin in the bottom, all the tins held in place with a brick. 2 tins have scent. Buckets then filled with 10 litres of water. Each successful find is roughly equivalent to discovering that a drop of scent has been put into 100 litres/26 gallons of water. Archie can find odour at a concentration equivalent to a single drop of scent in 100 litres of water.