Coralline algea going away

[Ruth]

Well that's the thing. I had coraline growing all over my tank walls and internal equipment in addition to my live rock. I had to scrape it off my viewing area almost daily. Now I have barely any on my walls or equipment - it has all turned green or just fallen off. The green is hard to scrape off but not like coraline. My rocks are still fine and covered in it.
Hopefully it will start again and if I could ever get it trained to only grow on the back wall and overflows I would have it made!