They expand bunches. I have those bricks too (different kind) and they fill space up fast.
I'm not an expert judge on growth (I've never had a baby tort!) but I'll bet @Tom can tell you! He knows quite a bit about sulcata's and leopards.
I'm not an expert judge on growth (I've never had a baby tort!) but I'll bet @Tom can tell you! He knows quite a bit about sulcata's and leopards.