No clue...

Some sort of nuisance algae? Cyano? Seems to be in "dead spots" and creeps along. I have added additional power heads, so will see if that helps. I have a large CUC and white sleeper goby and neither seem to phase it. The sleeper goby sifts everything around it, but once it creeps over a patch of sand, it won't mess with it...

As of now, I've been removing it by hand using a spoon. The stuff really hardens the sand and holds together pretty firmly while removing. Problem is, it comes back rather quick after removing the bulk of it.

Any ideas?

 

wow....not like cyano I've seen. It doesn't normally clump like that. strange

 

I get that too, not sure what it is though. But I would like to know.

Jake

 

Looks like cyano which has had sand blown onto it.

 

Mine will actually start to float up if I leave it for a while, and get sucked down the overflow. Does yours do that?

 

It's probably dinoflagellates. Can you adjust the white balance on your camera to remove the actinic hue? If it's brown or golden brown, it's likely dinos. If it's green, it can be dinos or cyano. If it's red, maroon, or black, it's usually cyano. It's going to be one of the two....see the Oxygen bubbles it's creating?

 

It's definitely brown or golden brown. Do dinoflagellates normally clump like that? They definitely produce a lot of oxygen bubbles. Any good way to remove? I've already got a ton of chaeto, 15 mangroves, phos reactor with GFO...

 

ReefCleaners.org | Clean Up Crews and Macro Algae - Nuisance Algae ID Guide

This has always been a good guide for algae for me... soo maybe it will help you?

 

http://www.3reef.com/forums/algae/dinoflagellates-help-60240.html