recently i gave a friend of mine a 29 gallon fish tank. the first time he tried using feeder goldfish they were diseased and killed the resident. he had kept the fish for months before that though, so he was getting the hang of it. my question is what type of fish should i advise him to get now? he wants to get something very aggressive thatll fit in a 29 gallon and i need a good suggestion to keep him in the hobby. anyone have a suggestion?
You can't get much more aggressive than a sanchezi