Welsos like to be in the sand. They don't want to be up against any rock that could potentially injure the animal's very delicate flesh. If it isn't opening, I'd have your brother check the Ca
& Mag and get back to us with exact numbers (Salifert test kits or the equivelant). My welso likes a good mag reading to be really happy. Also they enjoy feedings of meaty foods to help them thrive.
Also look to local annoyances... hungry tangs or angels, inverts that are picking at it, etc. As long as the flesh looks good and you can't see the skeletin he should be ok. Mine isn't *always* open either. My welso & lobos both look best in the early hours of the day.
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