Nice blue you have there and good idea on raising him alone, but there are a few things I would advise you to do if you want to ensure him a long and healthy life.
First thing first, get him something bigger than a 10g.
My guy is only 1" and I have him in a 40b all to himself.
And when you say NLS "medium" pellet, im assuming that is the 2mm? If so, that is too large even if he does eat them. Too many stuffed inside him can cause Swim bladder disorder; a form of bloat thats not just from stress or parasites. Basically will constipate him to death.
I feed mine NLS flakes until 2" then .5mm followed by the 1mm, all TheraA. Never larger than the 3mm as they are very dense and blues have a sensitive digestive system.
My 2cents
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