white aragonite getting a greyish look to it.

[coffeetwitch]

the product is carib sea special grade sand. it is aragonite and in a fish only tank. total depth is maybe 2-3inch. when put in the tank it was white now its kind of a dull grey. should there be any concern or just part of what aragonite substrate does?

thanks

[ccCapt]

It will stay white unless you have detritus accumulating on it or some type of algae starting to grow on it.