It's a good start but much too bright and open for this species. More plants will help but . Auranti need a cave especially males and they also need floating cover .
Tankmates of any kind are a waste of time it never works . They'll
Kill most and if they can't kill it they'll become stressed. They are highly territorial.
He hides in there because he's stressed.
You need to add floating plants as to diminish the impact of those BRIGHT lights. You also need to add a lot more plants. I find Vallisnerias look great in this kind of setup, and usually spread rather easily.
As for water changes, they are not very relevant. -IF- you keep the tank very well planted, it'll do most of the work in keeping the tank clean enough. I did a half yearly water change for my Aurantis because not only do they not need it, they also hate it with a passion. Another reason why you can't keep tank mates with them.
Which also tells you that you shouldn't overfeed, since you're not likely to change water all that much.
Devon might have another view on water changes, I found 10% every month and my half yearly 70% worked fine either way.
I base my water changes and feeding on the seasons.
I do A large top up in the spring followed by a very large water change a week or 2 later . Over the summer ill top the tank up as needed and do one or 2 small water changes . As falls approaches I stop doing water changes altogether, I don't even do to ups during winter and by spring the tanks are only half full from evaporation , then when spring hits I start again.
this cycle isn't absolutely necessary but as a rule they do not like water changes/fluctuations in the water parameters . so as mentioned previously they'll do best with heavily planted setups and very few small water changes.