Keeping tanks cool

In the southern hemisphere its just that start of what looks like a long hot
summer.
Any suggestions besides buying a chiller on keeping my tank cool on a
heatwave day?

Temp gets into the upper 90s here.. my tanks are in an un airconditioned
shed/building. I run many halides (6x400 and 2x 175). 4x 400 over a 5 foot
tank. with a few properly placed fans (aimed at the water) my tanks have only
risen to 3 degrees above where I normally keep them. I do keep my tanks at
natural reef temps so that when the temps do spike, there inst as much of a
swing.. My corals/fish dont mind going from 84 to 87, but if they had to go
from 78 to 87 there would likely be stress issues .

How many of other keep your tanks at 84F?
It sounds unusual for me...
BTW - average world reefs temp is rather closer to 80F, not 84F.

"Rbuehler9" <> wrote in message news:...
> Temp gets into the upper 90s here.. my tanks are in an un airconditioned
> shed/building. I run many halides (6x400 and 2x 175). 4x 400 over a 5 foot
> tank. with a few properly placed fans (aimed at the water) my tanks have only
> risen to 3 degrees above where I normally keep them. I do keep my tanks at
> natural reef temps so that when the temps do spike, there inst as much of a
> swing.. My corals/fish dont mind going from 84 to 87, but if they had to go
> from 78 to 87 there would likely be stress issues .

I was looking at the CoolWorks Ice Probe, which retails for $109.99 here. It uses something called a Peltier device for cooling. You could order a Peltier assembly here for $19.95, add a DC power supply and probe and have the same thing for about $40.

I've never tried them though, so I don't know how it would work. I had a/c problems for a week this summer and found that just a fan on the tank was sufficient to keep things cool.

Regards,

Dave.

"ReeFeR_MaN" <> wrote in message news:uhybb.1521$...
> In the southern hemisphere its just that start of what looks like a long hot
> summer.
> Any suggestions besides buying a chiller on keeping my tank cool on a
> heatwave day?
>
>

>How many of other keep your tanks at 84F?
>It sounds unusual for me...
>BTW - average world reefs temp is rather closer to 80F, not 84F.
>
Have a look atthis link.
http://www.animalnetwork.com/fish2/a.../1/default.asp

"Rbuehler9" <> wrote in message news:...
> >How many of other keep your tanks at 84F?
> >It sounds unusual for me...
> >BTW - average world reefs temp is rather closer to 80F, not 84F.
> >
> Have a look atthis link.
> http://www.animalnetwork.com/fish2/a.../1/default.asp

Wow! Thanks! I guess I need to correct slowly my heater