Guide me through this red slime...

[Jakepen]

Pretty certain it is spirulina. I did twillards test, however when I did it, I didn't have much to test. Over the course of two weeks it's gotten pretty bad. Started about the time I stopped dosing vibrant (why?). What should I do? Also should be noted I've let my nutrients rise (purposely). Also have increased my light intensity and duration. Added a couple pounds of cured dry rock recently as well.

 

[Oscar47f]

Low flow and settling of detritus, an increase in nutrients and depending on the light (for example t5 bulbs can change spectrum) and increased like can promote the growth of nuisance algaes.. Cyano bacteria (red slime) is a bacteria that is very similar to algae which is the stuff you have on your rocks.. There are products that kill the bacteria.. But before you do that try siphoning it out and doing water changes with clean R/O water and a high quality salt mix, along with increased flow if possible, reducing nutrients is another thing you can do however i didn't change the way i fed i just personally upped the maintenance quality and frequency