Yes the maculatus is dwarf species (because the author’s set-up is a nano biotope – only 15g), but there is no reason you couldn’t simply increase everything proportionally to create a much larger set-up for your larger species. Many SA cichlid keepers emulate SA biotopes, including blackwater environments. In fact, there are many products available to facilitate such set-ups.
If you’re intrigued by this and want even more information, visit Tannin Aquatics, a website that focuses on such aquatic biotopes. The site also sells products specifically to create SA environments in the hobby.