I recently took my brothers tigar oscar off him as he was not looking after it properly, It was in a right state, under fed, lost colour, lack of movement etc. I have managed to get it a respectable weight now which is good and it has a lot more movement.(even chases the smaller fish.) I was just wondering if the nice orange striped colour will come back and if so how long will it take?

It will come back when the oscar is healthy. Giving it a high quality diet is important. Manyn brands of fish food claim to bring out the colors in fish. Use these. But DO NOT over feed it.

I have just rescued 2 oscars (see my post in this section) and are looking to rehome them. They are a tiger oscar and a red oscar except the red in both of them is yellow. Is this natural or because of neglect? Or is it because he fed them standard cichlid pellets and not the colour enhancing pellets?