What is this?

Reeftang · Feb 7, 2018

It's a brownish gray washed out color what could this be I have it under the corals and some on the rocks.http://cloud.tapatalk.com/s/5a7b0bca2e5cc/VID-20180206-WA0075.mp4

nautical_nathaniel · Feb 7, 2018

Can you post the video as a YouTube link or directly upload it to Reef2Reef? Photos work as well.

Reeftang · Feb 7, 2018

see attached

Tahoe61 · Feb 7, 2018

I would be tempted to say a type of Bryozoan.

Reeftang · Feb 7, 2018

What does it come from and how do i get rid of it?

Tahoe61 · Feb 7, 2018

How old is the tank?
How much do you feed the live stock?

Reeftang · Feb 7, 2018

About 8 months old, what was the 2nd question? I do also want to mention that i was dosing nopox and for a week or 2 then stopped and i think it started showing up when i stopped.

Tahoe61 · Feb 7, 2018

Are you over feeding the tank?

Reeftang · Feb 7, 2018

Not really.

Tahoe61 · Feb 7, 2018

Looks like the tank was some algae growth to the rock. If Bryozoan they would probably be the result of elevated nutrients. I have never seen Bryozoan become overly invasive. They are similar to other inverts (think of pineapple sponges) were the populations wax and wane depending the nutrient balance of the system. I would speculate that over time the population will die off as long as there is not an increase in available nutrients.

Reeftang · Feb 7, 2018

Ok thanks.

Hans-Werner · Feb 8, 2018

To me it looks like calcium precipitates caused by hair algae or bacteria. These organisms can remove phosphate from the water which causes calcium carbonate to precipitates.

Reeftang · Feb 8, 2018

Hans-Werner said:
To me it looks like calcium precipitates caused by hair algae or bacteria. These organisms can remove phosphate from the water which causes calcium carbonate to precipitates.

Interesting please tell me more.

Hans-Werner · Feb 8, 2018

Phosphate inhibits calcium carbonat precipitation. When locally phosphate is removed, for example by bacterial biofilms or algae, calcium carbonate may precipitate at these places. Bacterial biofilms usually take up phosphate when they are fed with organic carbon. In algae light is sufficient. Precipitation depends from the oversaturation of the water with calcium carbonate, means KH and Ca.

Reeftang · Feb 8, 2018

Hans-Werner said:
Phosphate inhibits calcium carbonat precipitation. When locally phosphate is removed, for example by bacterial biofilms or algae, calcium carbonate may precipitate at these places. Bacterial biofilms usually take up phosphate when they are fed with organic carbon. In algae light is sufficient. Precipitation depends from the oversaturation of the water with calcium carbonate, means KH and Ca.

Make a lot of sense because I just added a cheato reactor to my system for the first time, my phosphates were undetectable but I had a feeling that I have a phosphate issue because I have all the signs of it like green rocks some hair that was concuming all of that. So now how do I get rid of this? Do I just wait will it go away by itself?

Hans-Werner · Feb 8, 2018

Do you dose calcium and alkalinity? What is KH and Ca concentration in this tank?

Reeftang · Feb 8, 2018

Hans-Werner said:
Do you dose calcium and alkalinity? What is KH and Ca concentration in this tank?

Ca: 450
Kh: 6.9

I'm actually going through a reset for my tank, I did a huge water change 2 days ago and I want to start doseing as well. I did dose kalk via ato up until a month ago when I realized that my parameters are to high my ca was at 500 so I stopped all together.

Hans-Werner · Feb 8, 2018

The KH is not high but maybe the precipitates have formed when KH and pH where higher due to kalk.

Reeftang · Feb 8, 2018

Hans-Werner said:
The KH is not high but maybe the precipitates have formed when KH and pH where higher due to kalk.

So it is definitely precipitates? I did also dose nopox before the cheato reactor and this all started when I stopped dosing it, Could it have anything to do with the bacteria Bloom?