Hello - We recently moved into a residence where the owners sold us their beautiful 180 US gal tank and about 20 fish, 2 Fluval 404 filters, a 55-gal wheel filter, and 2 heaters. They also left behind lights, accessories, etc., and we paid them only $500.
So not a huge investment, but my wife and I have ZERO knowledge when it comes to fish-keeping, except for what the owners told us about filter maintenance, feeding, etc. and the recent internet research. Here are the tank's occupants
5 Oscars of varying color (albino, red, etc.)
2 Iridescent Sharks
2 Pleco
2 Hoplo catfish
2 Blood Parrotfish
1 Red Devil (orange rather than red)
1 baby (?) Red Devil (although he's more yellow than red)
1 Bala Shark
1 Silver Dollar
1 Red-tailed Black Shark
1 Gold Severum (?) (he's tiger-striped and thin)
All these fish are full-sized or nearly so, w/ exceptions noted above. No fish in the tank is smaller than, oh, about 4 inches. The largest is probably one of the Oscars, maybe 9-10 inches head to toe.
1) I bought a "Love Parrotfish" from a pet store; he's purplish in color with purple round eyes. B/c his running buddy, a Fire Gourami, was eaten by an Oscar a few hours after they were put in the tank, I'm keeping him in a clean flower vase filled w/ about .75 gallons (regularly changed) for a couple of weeks until he grows big enough (3 inches?) to dissuade the Oscars from trying to eat him. Is this feasible?
2) Do I need the add'l 55-gallon wheel filter running (in addition to the 2 Fluval filters)--the previous owner has it running, but I'd like to save SOME electricity if possible and just run the 2 Fluval 404s.
3) Is it necessary to have real plants in my tank? If so, what kind are best w/ the number of fish I have? My fish seem to like to eat plants, from what the previous owner said.
4) Any other suggestions as to fish additions would be greatly appreciated.
Thanks!

5 Oscars of varying color (albino, red, etc.)
2 Iridescent Sharks
2 Pleco
2 Hoplo catfish
2 Blood Parrotfish
1 Red Devil (orange rather than red)
1 baby (?) Red Devil (although he's more yellow than red)
1 Bala Shark
1 Silver Dollar
1 Red-tailed Black Shark
1 Gold Severum (?) (he's tiger-striped and thin)
All these fish are full-sized or nearly so, w/ exceptions noted above. No fish in the tank is smaller than, oh, about 4 inches. The largest is probably one of the Oscars, maybe 9-10 inches head to toe.
1) I bought a "Love Parrotfish" from a pet store; he's purplish in color with purple round eyes. B/c his running buddy, a Fire Gourami, was eaten by an Oscar a few hours after they were put in the tank, I'm keeping him in a clean flower vase filled w/ about .75 gallons (regularly changed) for a couple of weeks until he grows big enough (3 inches?) to dissuade the Oscars from trying to eat him. Is this feasible?
2) Do I need the add'l 55-gallon wheel filter running (in addition to the 2 Fluval filters)--the previous owner has it running, but I'd like to save SOME electricity if possible and just run the 2 Fluval 404s.
3) Is it necessary to have real plants in my tank? If so, what kind are best w/ the number of fish I have? My fish seem to like to eat plants, from what the previous owner said.
4) Any other suggestions as to fish additions would be greatly appreciated.
Thanks!