browning out?

[ltt83]

im new to the sps world...i was at a LFS and they had this brown acro on sale i asked it is going to stay brown and he said no it will change color once it get use to it. i dont really understand the whole browning out part? what does it mean?

 

[keckles]

Excess nutrients leads to an increase in the zooxanthellae population inside of the coral. The zooxanthellae is a golden brown, which causes the coral to appear brown.

Usually, in a tank with very low nutrients and adequate light (specifically of a higher kelvin bulb) the coral will change into a more appealing color such as green, blue, purple, etc.