Hello there. I have a 170x60x60 (180g) aquarium and I have 1 Silver Arowana, 2 Joker Knife fish, 1 freshwater moral eel and I want to get more fish. I have been looking keen on the pufferfish and clown loach but I am afraid moral can eat the loach. Can I have your opinion about this tank? Also, the main star of the show is my arowana and I am looking for possible tank mates other than catfish for my Arowana named Queen.