My main tank is in the basement so it never goes over 81. The nano in my bedroom hit 89 yesterday though :O

Mine is 78.6. Open top though with a decent cooling fan. Do your tanks reach those highs, even with central air. Thats what keeps mine under 80 on even the hottest days.

tank temps
 

Yes it's a blazing furnace here in the prairies,only a small wall air conditioner and tank on main floor.But.... :) T5's baby.. 8 tubes,open top and it peaks in late afternoon..81.9

88 Yesterday with 2 x 400w halides. Think that I am going to reduce my photo period by an hour, and might add a clip on fan to the sump area, but I allready have 2 fans (50cfm) on the canopy, one of them runs 24/7 the other when the lights are on.

it hit 84.5 on monday night

i have fans and I ce packs ready if it goes high again...with +33 today

My main tank was 80-81 max, and that was with no cooling other than the standard fans in the bedroom. If it becomes an issue, it's as simple as tossing on the overhead fan

problem is evap, I'm using at least 2g of water a day it seems!

My nano is taking it a bit hard though, it's hitting 84 even with the lights off. It's gradual though, and I don't think I'd be able to keep up with evap if I put a fan on! :(

I moved my tank into the basement about a month ago. After that last hot spell we had, my tanks would get up to 84-85 upstairs but are a steady 78 now.

My tanks hit 81 yesterday so I have put a fan in the room and reduced my MH to 4 -5 hours and today my temp is 78.6.

Tom R

81.5

I'm just going to raise the lights 6" or so. That should keep things under control.

Mine was at 83.6 when I got home from work around 5PM
afraid to see what it hits today