madrefkepr
Advanced Reefer
just bought a mushroom rock, with what I thought was some sort of yellow sponge on in. Had't noticed it until I got home. Been in the tank about 2 hours, and now it's all turning a deep, bright purple. kind of hard to explain the color, except it's cool! Any guess as to what this is, and is this color change a bad thing? Can't imagine it's good. Thanks!
