hello can i add tuna or a salmon to my tank with 1 weird fish?

If your tank went empty it's probably because the fish you have right now killed it. I wouldn't add anymore fish.

Yes they do, but what size of tank do you have that could support a tuna, the different species can weigh from 15 pounds up to 1400 pounds, your tank must be huge.

Depending on species salmon can do 25 to 120 pounds, again they would need a larger tank then most people have at home.

Why would you add a fish to the tank that is from a lake you know nothing about the fish or the lake. The fish probably just ruined your tanks water I would suggest draining your tank or wait 2-3 weeks for your water to clean

That's going to be a giant fishtank for those fish. But do you really want to catch wild fish from a giants lake and put them in a tiny tank? It's cruel. Maybe think about buying some larger aquarium fish that would look much nicer instead.

You need to know the species of the fish in your tank before adding anything else. Also, salmon and tuna are large fish, not to be kept in tanks.

Harris TEETER JK Lakes search online to find out there natural habitat

idk what the species of it is i tried searching but i got no good answeer from google, but the fish is very small its half thesize of a pinky finger