06-08-2010, 05:25 AM
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The best thing to do is to keep an eye on little white marks to see if they grow/get worse. Keeping up with water changes and making sure the water is pristine is sometimes the best treatment. Sometimes I think of these little white skin marks that come and go to be almost like "fish acne". Or even little bumps/bruises from bumping into objects in the tank like sharp rocks or wood. Looks like you may have a few decorations/rocks that could injure a fish if they are getting chased or are scared and bang into it.
Don't think it's columnaris.
Last edited by JouteiMike; 06-08-2010 at 05:27 AM..