There's some white stuff that looks (and smells!) rather like mold on one of the wood ornaments in my tank. So far I've rinsed it in hot water and did a 50% water change...should I get rid of it? Is the stuff safe?
Is this in a cycled tank with livestock and is this a new piece of wood? store bought or native collected?
Usually on new wood and/or native collected wood you will get a fungus that is usually harmless and the fish and invert will feed off of it and/or it will go away on it own in a few days, if not, I would remove it and scrub it and put it back in the tank to continue to cure.
It was storebought, and the decoration was a painted wood ornament in the shape of Japanese Tori (so not a natural product necessarily). The water smelled terrible, and I tried siphoning the gravel three times, but there was so much of the white stuff ended up rinsing everything under hot water. I felt bad for messing up my cycle, but this stuff was EVERYWHERE. It did not smell good at all.