It's pretty much white, except for where algae grew on it when I was soaking it. Do you think coating it in aquarium silicone would seal it?
My adventures in keeping Indostomus crocodilus, the crocodile toothpick fish. AKA armored stickleback, paradox fish, and freshwater pipefish. Care is (to the best of my knowledge) exactly the same as Indostomus paradoxus.