First post and advice on making red pop

[FishyTJ]

Is this hole in the head? I think I'm seeing early signs which may have stayed dormant for a bit

 

[Kittiee Katt]

Is this hole in the head? I think I'm seeing early signs which may have stayed dormant for a bit

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I've got no idea what that is... Good food and clean water (30%+ change daily) until someone more knowledgeable chimes in. Sorry I can't be of more help.