I have 2 baby Orandas in a 10 gallon tank,( when they get a bit older will be transporting to a 20), however 1 seems to be sickly quite often whereas the other is very healthy, the water is balanced, fed every other day, weekly water changes (20%-40%), and are babied! Now the sickly one seems to be losing a small bit of its wen, and last week i found a chunk of it in the substrate ( white large gravel)! What could be the possible reason for this? I contemplated the two fighting, but they get along extremely well and are the best of buds, and the sickly one is a tad larger. Another possible idea may be is if my driftwood is too sharp? Well, its very rounded and soft, also the sickly one prefers to stay near the top of the tank. Ive run out of ideas! Anything will help!