My first tank was a ten gallon with some goldfish. For my 12th birthday I got a used 55 gallon with the standard ug filter with air pump, came with 2 10" oscars, 2 8" jack dempseys, 2 12' plecos. once a week I would throw in 25 feeder goldfish and I also fed them Meow Mix cat food. Only refilled the water for evaporation. Poor fish had them all for 2 years that way untill I traded them for smaller types of fish.
And proper fish thats not fair