I’ve got this stuff growing on my glass ..
Upon close inspection, it has both brown and green varieties (mostly brown though). Are these diatoms? Coralline? They seem to be calcified as they are difficult to get off my glass - I have to gently use a metal scraper. My tank is about 8 months old now. I do also have some green hair algae growing on my glass but it comes off easily with a soft sponge. This stuff doesn’t.
![D78E94A4-F747-46E4-8DFA-CAAAEC14B506.jpeg D78E94A4-F747-46E4-8DFA-CAAAEC14B506.jpeg](https://www.reef2reef.com/data/attachments/2968/2968597-ffabc533436cf21a1703bdf99c237bf4.jpg)
Upon close inspection, it has both brown and green varieties (mostly brown though). Are these diatoms? Coralline? They seem to be calcified as they are difficult to get off my glass - I have to gently use a metal scraper. My tank is about 8 months old now. I do also have some green hair algae growing on my glass but it comes off easily with a soft sponge. This stuff doesn’t.
![6724372B-2EAA-4CFF-ABA4-F0AFBDA84717.jpeg 6724372B-2EAA-4CFF-ABA4-F0AFBDA84717.jpeg](https://www.reef2reef.com/data/attachments/2968/2968596-f37f5db3b321a5d5cfd10ef07fee71ea.jpg)
![D78E94A4-F747-46E4-8DFA-CAAAEC14B506.jpeg D78E94A4-F747-46E4-8DFA-CAAAEC14B506.jpeg](https://www.reef2reef.com/data/attachments/2968/2968597-ffabc533436cf21a1703bdf99c237bf4.jpg)