What is going on with my tank?

[ChickReef]

Hello,
I am trying to figure out what is growing on my rocks. It looks grayish green and it’s mainly on the top part of my bridge formation. Any help and how to fix. I’ll attach pictures.

Details on my tank- I have had my tank for around a year. I have coral and fish mix. I have a small clean up crew of turbo crabs and murderous scarlet crabs

thank you

 

[Reefahholic]

Hello,
I am trying to figure out what is growing on my rocks. It looks grayish green and it’s mainly on the top part of my bridge formation. Any help and how to fix. I’ll attach pictures.

Details on my tank- I have had my tank for around a year. I have coral and fish mix. I have a small clean up crew of turbo crabs and murderous scarlet crabs

thank you

Looks like some turf algae. Beef up the CUC. Add several Astraea snails (1 per gallon for bad outbreak) and a few emerald crabs and watch it disappear.