From all I been reading the vibrant takes up to 9 weeks and do t expect much in 2 weeks. Especially if bad. Don’t expect anything to work fast as it took a long time to get like that.
I would suggest pulling as much as you can manually and continue vibrant. That will work much faster and will help limiting g the nutrients back Into the water as it dies
I would not combine multiple products. Remember nothing goods happens fast I. This hobby. But yes pull as much as you can. It is a tedious process but will pay off. What I did was pulled as much as I can then did a 15 percent water change siphoning as as the pieces broken off as possible then started doing the vibrant. I found it didn’t grow back and slowly deminished. I was also able to pull a couple rocks and scrubbed in the tank water from water change. This is my opinion