Thanks for the reply.
There isn't much left to whittle, LOL
The entire bottom is black but I was able to salvage the tops of the two larger pieces. Actually, I'm thinking the black edges with the dark brown tops is a nice two-tone. Call me crazy or call me trying to make the best of a ridiculous situation
I just wanted to make sure it isn't going to harm anyone. I thought of the charcoal aspect, but I didn't know if the pleco might be harmed. He doesn't usually suck on my filter
But he's probably smarter than me in this regard, guess he won't suck on the black edges!