sponge (color change)

[coltrref]

Sponge is changing color
when I arrived it was pink, then change to yellow and purple now, any reason?


_DSC0045 by alejandrosahuaya, on Flickr

 

[garygonzales]

looks like it could be dying...did you let it touch air..i heard that would do it...

 

[noy]

it looks like bacteria - maybe even some form of cyano. not sure how much you can do about it. does it flake off?

 

[coltrref]

looks like it could be dying...did you let it touch air..i heard that would do it...

not still alive.
have not touched their air.

 

[coltrref]

it looks like bacteria - maybe even some form of cyano. not sure how much you can do about it. does it flake off?

maybe some answers are found for this article: http://www.advancedaquarist.com/blog/bacteria-in-sponges-harvest-phosphate-clarifying-reef-waters

the question is: is it possible that phosphate is involved in changing color?

theory could be that other corals a range of phosphate amending color.
over-fertilization of zooxanthellae modify it, but in this case?

soon I upload another current image

 

[coltrref]

esponja pink by alejandrosahuaya, on Flickr

today

_DSC0006 by alejandrosahuaya, on Flickr

 

[gogo7]

what're you feeding it?

 

[Puffyluv]

Doesn't look photosynthetic...probably too much light, not enough flow and food?