Good morning, I desperately need help. I have a 6 month old goldfish who my daughter brought home from the fair (I know). I have researched requirements for looking after him and he is currently in a 105 litre tank with filter. I am eventually purchasing an outdoor pond for him as I know they grow. Problem is since I have introduced him to his tank from a 25litre there is a constant green tinge to the water. I have tried everything, water changes, liquids etc. I recently used Pure aquarium balls and he really seems unhappy. I have one more liquid to try 'Green away but I don't think this will help.' Can I get some sound advice please I don't know what else to do? All water tests have come back as normal except I high ammonia spike since adding the Pure Aquarium balls.