I think that sand is fine, it's just a bit bigger than normal, if they're not ingesting a lot of it or any of it, I wouldn't be worried, and even if they are, it looks fine enough to pass. That's just me though, I have extremely fine sand in my tanks, so don't get at me for my husbandry because I'm defending his choice of substrate, guys.
Anyhow, really healthy looking Axies, your wild type looks like he has a Dorito on his face, LOL. Your leucistic is beautiful with all the dark colouration on his face!
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