Thats one of the most common in use methods of keeping a tank cool
though. Short of a chiller, fans are the fine. They do become
marginal at best once this region (where you and I both live) starts
to get a bit warmer........I find I can not keep my tanks cool enough
in spring with just fans if the ambiet temp gets much arounfd the 80;s
so it gives us a good excuse to turn on the AC.

On Sun, 14 Jan 2007 11:01:49 -0500, KurtG
wrote:


I added a fan that blows across the surface and light fixture. It's
staying cooler, but evaporation is higher too. I doubt that's a long
term solution given my locale, but it will hold me until next month.

--Kurt


Wayne Sallee wrote:
Yep, fans do a great job of cooling the water. I prefer to put it over
the tank instead of the sump for 2 reasons.
(1) more surface area to evaporate
(2) fan in sump can tend to get salt spray into the air.

Wayne Sallee
Wayne's Pets



sdsdevelopment wrote on 1/12/2007 8:11 PM:
"KurtG" wrote in message
...
If it's not one thing, then it's another...

I came home this evening and my tanks temp was pushing 86.4. Ouch.

I turned off one MH, turned on the AC, and have a fan on the tank.
It's starting to cool off, but what now? Chiller? Any other tricks?

--Kurt

Kurt,
Try one of the 6" clip on fans blowing over a sump if you have one. I
use 2-250 watt MH and 2 VHO actinics on my 65 and 90 and with 2 fans
in canopy and one blowing over my sump and I never have a heat
problem. I do have a 1/10hp chiller just in case though. Tanks stay at
78-80 max even in the summer. On our 29 frag tank we do have a heat
issue with 1 MH but a bigger fan helped.
Water surface cooling does wonders for dropping tank temp but also
accelerates evaporation




-------
I forgot more about ponds and koi than I'll ever know!