Dont make a new thread, just keep asking questions in this one.
When you first get your oscar, you will feed it based on instinct. (Which means you may keep feeding it untill you see the fish subside from eating). After a few weeks, you will easily learn how much the fish can eat. Every day, you COULD feed the fish so much that its stomach is the size of a ping pong ball. This is a bad habbit and you need only feed as much food when its belly starts to look a bit pooched. (little bump in the stomach so to speak).
When you first get your oscar, you will feed it based on instinct. (Which means you may keep feeding it untill you see the fish subside from eating). After a few weeks, you will easily learn how much the fish can eat. Every day, you COULD feed the fish so much that its stomach is the size of a ping pong ball. This is a bad habbit and you need only feed as much food when its belly starts to look a bit pooched. (little bump in the stomach so to speak).

Very good point. At least a 25% change weekly to maintain good water quality.