I have been watching this youtuber who creates self sustaining tanks which require no CO2, no filter, no ferts or anything but a heater. He adds live plants then he had drilled two holes in the clear lid and put sweet potatoes in them. They had grown out and the roots into the water. I have a spare 5.5g tank so would i be able to do this? I plan to use Giant Duckweed, Hornwort and add some amano shrimp and a betta fish. Would this work out in the long run? It requires a 50% water change weekly and the roots need to be trimmed every so often. This seems like a great idea and the tank the person had created looked amazing.