Giant Sea Anemone half opened

[robert.de]

Hi Reefers,

My giant sea anemone has not fully opened for last 4 days and some tentacles started to change their color to brownish.

It's been in my tank for 3 months without issues.
The water parameters have not changed. (0 phosphate and nitrate, alkalinity 10 dKH, salinity 35 ppm, temp. 77, calcium 420)
Any idea what could happening ?

 

[T-J]

Browning can be an indication of too much light, creating an overabundance of zooxanthella.
Nems can be a bit temperamental at times. I'd just keep an eye on it for now.

 

[Jekyl]

Zero nitrate and phosphate is not good either.

 

[sagee]

Was it white when you got it? If so the brown color may be a good thing as I know a lot of places under light nem tanks and when they are in a tank that is properly lit they begin to develop proper coloration.

 

[robert.de]

@sagee , yes, it was white when I bought it.

@Jekyl, Today, I bought from my LFS some nutrients that includes phosphate. They also said 0 was not good and explained me how to use it.

thanks @T-J, I will keep an eye on it for the next days.

 

[sagee]

Yeah man white is not typically a healthy color in nems or corals, so in this case i would consider it coloring up and a good thing! By the looks of it you have a Haitian pink tip aka condylactis they come in a wide variety of colors sit back and enjoy the transformation .