- Joined
- Jun 7, 2019
- Messages
- 53
- Reaction score
- 26
My tank is about 4-6 weeks old. I used cycled bio balls from previous owner and also used fritz bacteria. I've started to notice brown in the sand and the tank walls and on the Marine pure blocks in the back and think it's diatoms but would like to make sure it is and what to do. I'm going to make a light guard for the back Chambers.

