More than one male of this species isn’t advisable in below 40 gallons of the closely planted tank. If these challenges are not addressed, it’s possible that the arapaima will go extinct before the stop of the century. Besides their looks, Black Mollies have unproblematic conduct and are instead hardy, https://aquariumonlinestore.tech.blog/2025/01/16/what-should-be-your-first-steps-to-set-up-an-aquarium/