I I have 480G set up.. I have owned this for 2 weeks only. It's overheat twice 
I shut down all the heaters but the temperature keep raising over 1-2 days.
I have 240G, 100G and 60G for over 2 years, none of them has the same problem before.
Any idea how to solve this problem.
Thanks for any response!

I shut down all the heaters but the temperature keep raising over 1-2 days.
I have 240G, 100G and 60G for over 2 years, none of them has the same problem before.
Any idea how to solve this problem.
Thanks for any response!
