Ice packs are a good idea. I've have kept the lights off for two days, only lighting with the led
moon light and the tank is stable at 78.5, we have had a few cold nights but I'm guess those hood lights put off way to much heat and the stock fans do nothing to cool them off. Not really a problem right now but I'll have to figure out a permanent solution when I move into corals and nems. I don't think they would like 90f water.
I am going to start looking into led
retro kits and see how much those will hurt me.
Just glad the fish survived the wild swings.