Is This Heater Burn?

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The burns are on both the scales, tail fin, and anal fin. The tail fin took the worst burns, there were two actual bumps.
Does fish get this by staying too close to the heater for too long...??
 
i dont think aros would get heater burns as they dont stay still long enough to get burned like other fish who sit near the heater for a long time

i would look at other fish in the tank to see if they are fighting or the aro could be tail biting
 
Definetly an odd looking injury. Heater burn would be a wider mark, plus can't see an aro sitting long enough to get a burn.
 
No tank mates. Just two pieces of driftwood with java ferns attached to them. It does like to stay by the heater and filter for a long time when its scared.
It could be the filter.
 
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