Okay I decided to go fore dwarf puffer fish, because they're so sweet, I think that would love my aquascape, Dwarf puffer Paradise.
I will put maby 10 dwarf puffer fish, and want to make it look like this whit stone wood, and moss and som plants, and make some caves, like this guy have done:
And build some rocks like this : https://ibb.co/2qGdXkk
I will buy this filter unimax 700, it can hold 11 kg bio mass, and have 1700 liters flow per hours, not to much flow just like the puffer fish like it, i will fill it up whit biohome, It will take the animoark, nitrit, and nitrat down, so I dont have to water changes that often.
I have ordret 80 kg stone, and will start glue the stone together when thy will come, and then form the structure, and then next week i will get the 450 L aquarium, i will post som picture on the way.