Cooling water without a chiller?

[Keith A.]

Does anyone have any tricks for keeping the water temperature from increasing too much when the lights come on other than using a chiller? I have a small desk fan underneath the canopy to try to blow out some of the hot air but the water temp still gets up to between 80 and 82 degrees. The thermometer in the sump is set at 74 degrees. The tank is next to a sliding glass door but we have an overhang (pergola) above the door on the outside so the tank doesn't get much if any direct sunlight. The tank is also in one of the more cooler rooms in the house.

 

[bavass]

if u have a sump? I have a clip on fab that blows across the water and it keeps my temps down during the summer by a few degress

 

[Reeffanman]

82 degrees isn't terribly high reef temps range from 68-82 degrees. As long as you aren't more than 82 you should be fine