White stuff on live rock

[TOBY'S TANK]

Hello, were new here and have had our salt water aquarium for 18 months. I'm trying to find out what this white stuff taking over my live rock. We've never had this before. Any help would be greatfull.

 

[blaxsun]

Hello, were new here and have had our salt water aquarium for 18 months. I'm trying to find out what this white stuff taking over my live rock. We've never had this before. Any help would be greatfull.

Some images might offer some insight...

 

[Matt Bravo]

Hello, we’re new here and have had our salt water aquarium for 18 months. I'm trying to find out what this white stuff taking over my live rock. We've never had this before. Any help would be greatfull.

+1 definitely get some pics

 

[Uncle99]

Hello, were new here and have had our salt water aquarium for 18 months. I'm trying to find out what this white stuff taking over my live rock. We've never had this before. Any help would be greatfull.

Welcome to R2R!