marcus wrote:
your tank is about 60g uk so is a good size for one oscar but not any other fish. you may need to add a little more to the diet other than just pellets but its a good start. sand is a very good choice as a base. you will need to wash it lots to remove the salt too. it may be easier to just buy it, washing sand isn't easy, but if you have the time go for it.)))
One thing you are missing from your list is a water testing kit. its probably more important than the fish.
X2
Have a look around the site for other foods to feed to your oscar
You need to be able to test for ammonia, nitrite, nitrate and Ph
Maghan R is right a heater is a good idea unless you live in a warm climate- the temperature needed is 79f