As the title says, I'm considering purchasing a 5 gallon saltwater tank by Fluval. It will be my first saltwater tank EVER, so I'm hoping I can get some support as I go about this process! I know that gallons of saltwater can be purchased to fill the tank, so I've got that down. However, I have a couple important questions: 1) what mini monster fish can I purchase that will thrive in the tank, and 2) what should I decorate the tank with so it will a) suit the fish, and b) optimize the tank's appearance? Thank you guys in advance! Attached is the photo of the tank: