Coralline algae fade

[reefer buddy]

So I have noticed that my purple Coralline is fading or bleaching out in places, is this normal should I worry? Everything else is doing well the best it has ever looked.

 

[Flanders]

IME, yes, you should worry. I would do tests, run carbon and do a big water change.

 

[Sweet]

Like Flanders pointed out you need to do some test. I would check your calcium level, your coral might be consuming more than it needs to sustain the coralline.

 

[magdelan]

This tells me that your alk/Ca/Mg is out of whack. Test them and adjust accordingly.

 

[EllieSuz]

Exposure to air will turn coralline whitish, so I see some bleaching of it along the top after a large water change. Where are you seeing the discoloration? If it's random, then I would certainly double check calcium and alk.

 

[ReddyW]

I've read that leaving the lights on during a water change will bleach out the coralline above the water line. I've never had it happen, but lots of people have reported it. I guess it depends on the brightness of your lights.

 

[downbeach]

As has been mentioned, lowering of the water level during a WC will expose it to air, and cause it to bleach, and die off. What are your parameters?
Also, have you replaced or upgraded your lights lately?

 

[reefer buddy]

Lights could be changed. but ran tests and all were good but salinity was a little low fixed it hope that fixes the problem

 

[Willistein]

I would have your Alk/Ca tested by someone else to confirm. This happens typically when Alk is depleted.

 

[Gary Majchrzak]

Lights could be changed. but ran tests and all were good but salinity was a little low fixed it hope that fixes the problem

what brand Mg test did you use?