Hi everyone! Can someone please help me identify this white, crusty, flakey stuff that’s in my Croton? I’m not sure if it’s calcification from my tap water, but I don’t think I’ve always watered with tap, and none of my other plants have this specific substance on them. It’s on the base of this leaf, and then this leaf started drying and curling in. The white stuff is on some of the wood chips in the soil. The white stuff flakes off and doesn’t leave anything behind. But the fact that this was on the base of this leaf and now it’s dying, I feel there’s a connection, but I’m not sure what exactly it is and how to treat it? Any help, advice, suggestions I’d really appreciate it! I’ve been having trouble getting this guy to grow.