60 gallons is way to cramped for a 3 oscars. Way to cramped. Is it possible to keep 3 oscars in a 60 for 5 years? Absolutely. It is improbable that you won't have aggression problems to the point one dies, but it is certainly not impossible and it does happen. From a bio-load standpoint, it would be almost impossible to keep them in decent conditions from a water quality standpoint. Oscars are very hardy, and can survive a lot problems. I would bet my next paycheck that they all have severe HITH. No doubt in my mind, that they are disfigured with HITH from the poor conditions. Also, someone said above that "it is a myth" that fish get stunted in small tanks. That is not accurate. Oscars get less stunted than many others, however, ask a Discus owner whether a fish can be stunted being in a small tank. Fish release hormones that in concentration stunt growth. All fish do this, but some are more susceptible to the effects (i.e. Discus). Also, the formula qouted in the book referenced above is useless. I can house over 500 1" cardinal tetras in my 180 gallon with no problem. I cannot house 500 inches of large cichlids without severe problems. That formula is irresponsible and innacurate, as is the picture of the 3 red devils in the tiny tank. A lot of people on here give good advice on tank sizes for oscars, but it is not in this thread. If you want to have oscars, you can in any tank you want, but if you want healthy fish in good water conditions, then go by the guidelines most experienced breeders of these fish use.
