I bought a banana tree in August of 2021 and never thought it would actually fruit. I was walking by it the other night and saw something purple/maroon out of the corner of my eye. Popped my head between some leaves and was greeted by some baby bananas!
So far not really. The plants keep the water clean, the fish produce fertilizer for the plants. A bunch of different microfauna help with the cycle and also provide tasty snacks for the fish in between feedings. I can leave for about a week at a time and everything is fine.
Two things recently were I had to set up a snail trap to reduce their population, and I’m currently dealing with a cloudy water situation where normally it’s crystal clear.