Your panchax,cherry barbs and danios all have a lifespan of about three years four at tops the rainbow shark can live up to ten years.
Oscars grow quickly and can reach 16 inches within a couple of years,they should only be kept with fish that have similar growth rates and are capable of looking after them selves or they will soon become lunch.Clown loaches grow very slowly and and rarely reach their full potential size in normal aquaria,usually maxing out at about 6 inches.