i have a 75 gallon with an arowana in it and i am planning on getting a small stingray right now i have an aquaclear 110 and a fluval 405 on it and i was wondering what would be the best combination of media for the tank. the 110 has the foam, chemi-pure, and bio max. the 405 has foam, carbon, ammonia remover, and bio max. i add blackwater extract whenever i do a water change i don't know if the filters will affect this.