would this work for substrate?

[Jer723]

it looks really cool . . . tell me if its ok to use

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[VARNYARD]

I think it would be very hard to keep it humid enough for tegus; it looks like it is designed more for desert species.

 

[FoxxCola]

Agreed.. plus, it is expensive for the amount of substrate you get. I would also be worried about impaction, because of the loose sand that would be kicking around.