- Joined
- Jul 12, 2017
- Messages
- 3
- Reaction score
- 7
Hi everyone, I've had my aquarium up for about 8 months now, I've noticed these little red things growing on my power head and I'm not sure what it is. They are hard like rock. And very sharp. I have 1 clown fish, 2 engineer gobies, a few snails and hermit crabs. Its a 37 gallon column aquarium. Thanks for any help that anyone can provide.



