Can fish live ok in a water butt?

Fish can live in a water butt if the conditions are suitable, such as adequate oxygen levels, proper temperature, and appropriate water quality. However, water butts are typically designed for rainwater collection and may lack the necessary filtration and aeration that fish need to thrive. Additionally, without proper management, water butts can become stagnant and lead to poor water quality, which can harm or kill the fish. Therefore, it's not ideal for keeping fish long-term.