Had my TSN a couple months now. He is dark to the point where i can barely see pattern on his back. Anything to do with stress, water parameters, substrate, background, etc?? I kind of prefer the lighter grey with more vivid patterns.
Probably just his natural colouring. If he seems healthy and active I wouldn't worry too much. I see what you mean by the dark pattern though. It doesn't really pop like the usual colouration does.
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