Succulent browning! How to fix it?

[RoscoeLim]

Hello, thank for helping the other time!

This time, my succulent (which I believe to be a haworthia) has turned from lush green to a rather greenish-brown colour.
It is part of a terrarium with other cacti and succulents, and placed at a North and East facing window.
The succulent was green when I brought it home so what happened to it? Kindly help me cure this plant!

12665807_958614247552621_20307855_n.jpg (38.11 KiB) Viewed 835 times

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Location: Singapore (around 30C and 75% humidity, tropical conditions)

Is the issue with too much little light/water?

Thank you!

[greenknight]

It looks fine, probably just getting more light than it was before. Take a look at these - http://davesgarden.com/guides/pf/go/1236/" onclick="window.open(this.href);return false;
http://www.cactus-art.biz/schede/HAWORT ... enuata.htm" onclick="window.open(this.href);return false;

[HairyHarry]

A mixed pot like this will proof difficult though. Especially the sedum and the cactus are somewhat different in watering needs. And I have my doubts about your soil...