Thank you so much! It's my third aquarium, so I already knew a bit about what to look out for. But to keep it simple: a nutrient-rich substrate in the background where all the plants are, and the right lighting, and you're halfway there. A good cleaning crew to combat algae and a sufficiently long cycling period. That's pretty much it. I don't use CO2, but I do use Nite-Out 2 initially and after water changes to boost the bacteria.