Hi - I'm new to this site, and have been reading in both the Saltwater and Freshwater forums. I have a 225 gal
tank that I just emptied and cleaned.
We had 2 koi in it for 6 years, thinking initially that we would get a pond and move them outdoors. That never happened, and they grew from little 3 inch koi to about 12-14 in. We gave them to someone with a pond since 1) they're big messy fish, and 2) they deserved something better than being in an aquarium. Now they're in a big pond with other koi. While we had them we couldn't have anything "nice" because they would knock over and tear out any decorations, etc.
So at first I was assuming we'd go with a freshwater aquarium, and go with tropical fish and live plants. But I've also admired marine setups, so I'm trying to decide which direction to go now.
What are the pros and cons of each?