good luck with plants and the severum. I've heard that severums are plant eaters, but I've also seen planted tanks done with them as well.
Heck, I've seen planted tanks done with silver dollars as well, I think it depends on the individual fish. I once had my silvers eat my anubias D:
Then I see a massive planted tank filled with stem plants and housing 6 black bar silver dollars...so lol that's fish keeping for you