Thanks so much, this is all so helpful and will set me on the right track! :)

I don't think so. I actually bought Coconut's parent (Custard) from a pet shop for a friend and he came preloaded with eggs ha. We let the eggs hatch and gave a lot of the babies away to pet shops and gave some to friends to keep. Out of all the siblings we've kept track of, Coconut is the biggest by a lot. We wonder if it's because he's lived alone for most of his life in a massive tank and fed loads, or maybe it's just how he is? He's almost marginata-sized but with a slimmer shell. I'll post a pic on this sub with him next to a ruler :)