White wiry/strings on rock

[Aaron Hobaugh]

hi all! Can you guys tell me what is growing on my rock? It grows long and it hard, wiry stuff. Some rocks will just have a single strand all by itself. Others will have a bunch. You can pull it off but it isn’t that easy. Everything is growing and healthy. I dose seachem 2 part, along with ion. I have tried hydrogen peroxide with no luck. My tank is roughly 5 months old, I have a bunch of corals and two clowns. My parameters are

Cal-440
Alk-10
Mag-1380
Nitrate-1
Phos-.01, checked via Hannah ULR phosphorus
Nitrite and ammonia 0
Ph-8.3
Salt is 1.026


Any help would be appreciated! Thanks guys!!

 

[Aaron Hobaugh]

Oh and you can see on the one pic a little green algae. I can’t figure out what that is either. I have very little of that. Like what you see in the picture is about it. It is very hard in texture and extremely hard to get off. You have to scrub it. Thanks!!