Cyano with no nutrients?

[arash53]

I had this issue for couple month, i used blue vet redslime control and they all gone next morning!


Sent from my iPad using Tapatalk HD

[Proteus]

I am prepared to use the meds to be rid of it but there must be a reason why this is happening

I blow off rocks daily to remove it but also to remove deitrus. So I can't see it being leech from rock either