I know of several ways to quickly cool off your tank without an expensive chiller.
1. use dechloronated water and freeze it in a baggie or bottle, then place it in the tank and replace it with another already iced package, best to go with 4 bottles/baggies so you can re-freeze the unfrozen packages without their being a delay.
2. keep a fan or several fans on over the tank (pointing at the waters surface), this will increase evaporation and quickly cool the tank, I use a mix of fans and ice packages to keep my newt tanks below 65 C (or F? I always mix them up...).
3. a minifridge, you hook it up to your tank via tubes and you just circulate the water and it keeps the tank fairly cool, in your heat tho this may just overheat the fridge and turn it into a mini-hotbox which would in effect heat up your water...
4. put your tank in the basement, the basement tends to be the coolest area in a given home, even in your heat your basement should be much much cooler than your room, besides that the fish prolly won't mind the change of scenery nor the additional darkness.
5. put the tank directly below your a/c, but i doubt you have one as the temps you describe are crazy for a/c.
6. this one can be tricky, turn off your furnace and then place your tank over the hot air vent, this will funnel cooler air down towards your tank, but if you live on the second floor you will also get the hot air that rises into the vent from below, so it can be a risky situation.
7. (I forgot this one, my bad) put the fish in an already chilled cooler, if you have one of those plastic ones you can just fill it with treated water, add some ice baggies or wahtever to cool the water, acclimate the fish, then treat the cooler as an appropriately sized un-cycled tank (do water changes, monitor ammonia, etc), the water WILL remain colder for longer so plan accordingly, do not chill it to the high 60s because you figure it will warm up soon enough anyways, my own cooler tank can stay at the low 60s for about 5 or 6 hours before i need to re-add some ice, if you use salt in your water it will allow the water to cool much faster with less physical signs so you might have frozen fish in unfrozen water if you're not careful.
Last edited by shmifty5; 07-17-2010 at 04:41 AM.