What is this stuff?

[Ippyroy]

This green stuff is growing all over my rocks. It is hard and does not scrape off. A brush does not remove any of it. Tank is only 6 weeks old.

 

[fishguy242]

hi poss green coralline??

 

[Ippyroy]

My tank is only 6 weeks old. I did add the bottles of coraline algae and there is one tiny spot of red but this stuff is all over. I hope it doesn't stay this color. I ordered a bigger CUC. I hope I didn't mess up. I might have a giant nutrient bomb if this stuff is coralline.

 

[Ippyroy]

Is it also normal for all of my corals to be brown when lights are out? They look great and open up with lights on, and one favia opens up big time with lights out, but he is totally brown?

 

[BighohoReef]

Brown is okay when your lights are off... when your lights are on an they are brown you have a different problem.

The green stuff you have growing is a precursor coraline... Here’s an interesting article about coraline algae. Lots of good info

Coralline Algae - The Ultimate Guide | ARC Reef

Everything you need to know about red, pink, purple, and green coralline algae. Learn the different saltwater coralline algae types, and how to grow it fast

arcreef.com

 

[BighohoReef]

reposted

 

[BighohoReef]

Reposted

 

[Ippyroy]

Thanks. I have definitely made a huge nutrient bomb. Time to buy some nori. Anyone want some snails? Ooops

 

[fishguy242]

did you run black out during cycle,yes without lights on most corals will look brown,if green coralline will cover in colors,or die off helping keep calcium up

 

[Ippyroy]

I didn't turn on lights until adding fish. I cycled my rocks with MicrBactor XLM in a Brute can for 4 months then 1 week in tank. Added fish and small CUC. One month later added corals. One week later started my fuge with chaeto. That is a bird's nest in the pic. It drives me nuts. Gorgeous with lights on though and super fuzzy.