why is it that when ever I buy Zoa from someone they are brightly colored and once it opens up in my thank it's all brown!! Big zoo rock from montisteve, palys from itzme, bright pink cocos online, and a few others all brown! I know that the zoo rock from Steve is the same from the pic but it was an alsome light green and once in my tank it's brown.. Grrr is there an addative for zoos? Something to get there color? Water is normal, light is 8 bulb tek with 4 actinic 2 daytime 2 other daytime