live rock changing color

[waterlogged]

The tops of my live rock that face the light are starting to change color because of algae(It is not hair algae). Is there anyone on the clean up crew that takes care of it or what do you do for it? Do you take out the rock and scrub it?
I use RO/DI water and it has 0 TDS. I have no diatoms on sand. I run PC lights 7 hours a day. I do a 10g water change every 5 days on a 125g tank.

 

[krichardson]

what does the algae looks like? what color...

 

[waterlogged]

Originally Posted by krichardson
http:///forum/post/2497854
what does the algae looks like? what color...
Green. No hair algae. A lot like what grows on the glass of a freshwater aquarium.

 

[krichardson]

the snails should get to it

 

[yosemite sam]

What are your water parameters?

 

[waterlogged]

Originally Posted by Yosemite Sam
http:///forum/post/2497987
What are your water parameters?
Ammonia 0
Nitrite 0
Nitrate 20
Alkalinity(kh) 200
ph 8.2
temp. 79
sg 1.024
IO salt
RO/DI water with 0 TDS
I do not have a large algae problem but over the months the color of the top of the live rock has changed color where the lights shine on it.

 

[ibew41]

can you post a pic

 

[waterlogged]

Originally Posted by IBEW41
http:///forum/post/2498126
can you post a pic
The wife has the camera and she isn't here.
It looks about the same as a grass stain on pants and it is only the side that faces the lights.

 

[mkb623]

Not to sound dumb but what color was it to begin with?

 

[waterlogged]

Originally Posted by Mkb623
http:///forum/post/2498610
Not to sound dumb but what color was it to begin with?
Do you mean the live rock. Some of my tonga branch was white and the fiji was tan or light gray.

 

[morval]

how long has the rock been in the tank? it may be green coraline which will begin to turn pink or purple soon

 

[rcreations]

It is probably green coraline. My rock started out with green coraline, then it slowly turned purple over time. There's no snail or cleanup crew that will remove green coraline. Just leave it alone, it's the natural progress.

 

[horsin1963]

does it look anything like what I have attached it the picture? if it does then your rock cycled. Did you puy new lighting on or start to add any chemicals like purple up? both of which well cause your rock to cycle. if it is new lighting on the tank this is normal. I had went from a 10k bulb to a 18 k adding alot of purple up my rock turned from purple to blue gray to almost white now they are green I hope in a few weeks all the new rock will be nice and purple.... good luck

 

[waterlogged]

It's not coralline algae.

 

[waterlogged]

It looks just like this but only the side facing the light.
https://forums.saltwaterfish.com/t/312769/my-150-in-the-wall