Help identify white spots on driftwood
Help identify these white spots. This was spotted on the underside of my driftwood. The white stuff can't be picked off. I would describe the texture similar to chalk. It's very hard and if I scratch it, it will break apart and turn to dust. I also noticed two of these white spots on my heater.
The driftwood is relatively new and very soft. I scraped off a thick outer layer before adding it in my tank. My water clouded up for a few days before clearing.
I don't test my water. Fish and plants do great.