Today I have found that one of my oscars has changed colours but their only 4 inchs long, is that not to younge?


Cheers xxxxx

No it's not, mine were small like that when they started changing. Casino got his name from the large C on his side and it was gone before he was 4 months old. I really hated to see it go. Since then he's gone from being red and black to a grayish color.

Brill name

Anyways I'm just please my oscar will be okay.

When you say change colour, was that gradually, or a sudden change in colour?

Like most young animals, Oscars have juvenile colours which change quite a lot as they get older. However, this isn't an instant change, you won't wake up one morning and notice that your Oscar looks like a different fish. Many animals change colour for various different reasons, aggravation, breeding, ill-health etc. I'm not saying there's anything wrong with your Oscar, just want to make it clear that it is quite normal for Oscars to change colour, but not overnight.

I don't know but I'm having some problems with the amonina at the min as I have added a new pump. But i have another, their both tectra tec 1200. But today and yesterday I have done 50% water change. But I'm doing a 50% water every day for a week and see if it makes any differents.

If there is ammonia present, that could be why your Oscar has changed colour. Has it got brighter, or has it gone very pale?

As it's a tiger oscar the markings have been made different, but they have become brighter

vibrant color in most fishes shows their state of health.
and most oscar do change color as they grows.

dull or pale color needs attention as what OFL had said
while vibrant colors indicates what you are doing is good.