What is this

[Lordadamxxii]

 

[Lordadamxxii]

 

[sfin52]

Sponges

 

[Lordadamxxii]

The slime stuff?

 

[JCTReefer]

Looks like cyano to me.

 

[Lordadamxxii]

How do i get rid of it and make sure it doesnt come back

 

[sfin52]

Red cyano white sponges

 

[mikester]

chemi clean by boyd guaranteed

 

[Difrano]

How do i get rid of it and make sure it doesnt come back

Looks like Cyano. First we need to know your parameters to give you an educated answer, there are many ways to fight it you can watch this video: