Hi guys . This is my first post . I have a 250g tank which houses a 11" silver arrow and two red albino oscars of about 6" . Have 3 pairs of silver dollars of 2" size. Water parameters are normal . But my aro scales are missing and can clearly see a red cut on its body since yesterday . Oscars do not go behind arowana chasing all time, it is just when they face off oscar hits on aro body which i thought as mouthing . I have never witnessed any scales flying off during this process . But I am worried . Please help
