"news.so-net.com.hk" vincent0@signentdotcomdotsg wrote in message
news:3ec851b8@shknews01...
Hi,


My question is, besides adding a heater which i can maintain at 30 degrees
celsius, so as the difference will not be too large, is there any other
way
I can cool the water even though my light is on?


Outside of setting up some kind of cooler, a fan or some such, I'd say the
best thing to do would be to switch to a small flourescent bulb rather than
the incandescent one I assume you have now. The flourescent won't create as
much heat.

bill vincent