Came from vacation to this

[merfury1989]

Hi guys, so I came from vacation after 1 month to this (pics below)

I have just the dottyback in here, he doing fine.

But my Grape corals and Montis are covered with this gooiy thing/substance.

Any idea what this is?

Alk 8
Cal 430
Mag 1390
Ph 8
Temp 25
Nitrate around 10-12
Phos 0.03-0.06

 

[Dolphis]

Can you blast it off with a turkey baster or a power head?

 

[merfury1989]

It needs to be scrubbed to be removed

Not hard scrubbing, just normal scrub can take it off

But what is it?

 

[Jedi1199]

Looks like the same purple algae I get in my 180g and 32g tanks.

In the 32 its a combination of bubble algae and whatever the purple algae is. in the 180 its just the purple stuff. I get a thin layer of that on the rocks in the 180. in the 32 it covers everything!!

I suspect it is due to poor lighting quality. The 180 has a single LED bar light as this is a simple FOWLR tank. The 32 was intended to be a micro reef but has never quite worked out. The light on the 32 is this...

SolaRay 4K Sphere LED is a 6yo Reef Light Rebadge | Reef Builders | The Reef and Saltwater Aquarium Blog

The SolaRay 4K Sphere LED Reef Light from Coral’s Coral would be a very interesting light with a novel form factor if we hadn’t already seen this exact light more than six years ago.

reefbuilders.com

I won this light in a contest on a live sale a while back.. Honestly, I feel a Kessil A360 tuna blue would do a better job.

In the morning when the lights are all on, I will snap a few pics to show you...

 

[Boreas_SA]

Maybe a type of photosynthetic sponge? Collospongia sp perhaps?

 

[Alexraptor]

Crysophytes perhaps?