Aquariums: What else is there?

After a lot of Reddit posts I have bought a stand, remodeled the tank, bought the right fish for the tank. I also bought a large heater and new filter that are coming in tomorrow. The fish are very active, my pictus cats are always chilling on the bottom, eating everything and zooming, my rainbow sharks love there hiding holes. Each one chose their own space. My favorite of all, the angel pair I got are swimming and always wanna eat. They come to the feeding spot every time I get close to the tank. Is there any suggestion on other things to make them happier. I am new to this and wanna give them the best life possible!