What's happening with my GHA?

[cdemoss01]

Recently I changed my filters media out. Taking out my bioballs and some other stuff replacing it with seachem matrix purigen clear blue carbon and marineland filter floss. I've taken out half of my bioballs as I was told to take them out weekly. Anyways my GHA just looks weird is it dying?

 

[Formulator]

Posting to bump this off the unanswered threads section. This is a duplicate thread already being discussed here:

Thread 'What's happening with my GHA?'
https://www.reef2reef.com/threads/whats-happening-with-my-gha.1068665/