No idea on water hardness. City tap water that's sat a couple of days to release chlorine then I got in a huge bottle of Seachem Prime. I will definitely look for some recipes though, I didn't know those were around.
It's definitely not her siphon, that's on the other side of her shell. If the white thingie were on the left side, then her siphon's all the way over on the right. Far sides, both of them, kind of.
I do have a cucumber I slice on occasion for her and blanch best I can without making it into mush that disintegrates on contact with water. I'll see about getting some carrots though. Do you know if the ones that are best for them are those that actually have formed seeds in them? The one I bought wound up being barely formed in that aspect.