Rock turning white

[muck]

You got the rock from Dez, correct?
Was the rock in his sump?
Not sure what lighting he has on that...
Check with him, but it does sound like a light amount change.
Too much too fast maybe...?

[Murminator]

Yeah it was in his sump I don't think the lighting was the best ....thats what it probably is......so it will turn purple again??

[muck]

It should purple up again as the tank matures.

[Richer]

Sounds like the lights are the cause of the bleeching. Minor bleeching happened to me when I bought some rock from Des (under 192 watts of pc lighting). Then I got some major bleeching when I switch to 2x175watts of MH lighting. After a couple of months, everything is starting to turn purple again.

-Richer