JBJ 12 gallon Nano cube questions

[Beano1169]

Thanks that helped alot I tried it in C1 but its a bugger to deal with. I am doing my weekly change out tuesday, so I will swap er then haha.
I do have a question for anyone out there who uses Chillers on nano tanks, my tank at night sits at about 79.2 F recently I have discovered, that with the warmer weather if I do not take percautions to close my room door, the tank may get as high as 85.6 F. Im a little worried about this and would like to know the best solution to correct it, I am planning on an LED upgrade with stunnerpros from Modular but until then I need a solution.
Thanks for the help everyone, and hope to hear some responses soon.