MineShaker
Aquarium Advice Activist
- Joined
- Aug 8, 2015
- Messages
- 144
Did you try to scrub it? If it won't come off try testing it in a bucket to make sure it works and doesn't shock anything
Keep calm and drum on
Nah, its pretty common for stuff to build up on heaters. If it doesnt scrub off soak the heater in vinegar.