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Discussion Starter #1
Ok so I know it's normal for fish to suck/nibble on rock an ornaments but I'm wondering just what it is they're doing? There's obviously nothing there the human eye can see, so bacteria? Another reason I think this is because they seem to do a lot of this at the heater. Any idea?
:dunno:
 

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I concur with the above. They also pick at items looking for essential minerals. Before you ask, carnivors get minerals from what they eat.
 
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