Yet another "Is this Dinos thread"

[Steve and his Animals]

It's strange but seems consistent with symptoms of a dino outbreak. Only coating the sand (and what seems like a return of my bryopsis issue, fantastic).

Only coral that suffered from this is a large birdsnest and a gorgonian. What I'm wracking my brain about is the cause. First thought was I had been harvesting my macro in the refugium too heavily, leading to my nurtients tanking as it regrew. Then I thought I probably need to replace my UV bulb. Probably both. Thoughts?

 

[Cool Fish]

Maybe redirect the flow, or increase it?

 

[Steve and his Animals]

Maybe redirect the flow, or increase it?

Flow has never been a real issue before, and I don't really wish to aim it at the sand as I use Bahaman oolite, so it's very fine.