bettaowner
Aquarium Advice Addict
I would not get the long horn cowfish. They get big and scan release toxin. Triggerfish can be aggressive and have a high bioload. The fish with the high fin sounds like a species of jack knife fish. Highly predatory. Any eels would try to eat smaller fish. I would advise getting a lemon peel angelfish orang of the more peaceful centropygne angelfish. For the bottom, a pistol shrimp with a watchman goby would be neat.