photoperiod question

[Briney Dave]

due to changes in how my classroom is cooled (more like not cooled) I am facing very high temperatures in my tank.

I am currently asking members of my community for help to buy a chiller but am very uncertain of that outcome.

My room is vented at night which brings the temperature down into the lower 70's but the lights are heating the water to near 90 F. I know this over drives metabolic rates and reduces the dissolved O2 level.

I was wondering if any of you have ever switched photo-periods to run the lights at night and off during the day.

How stressful is that, am I creating a cure worse than the problem??

Even if I can only buy five degrees it very well may be the difference in saving lives.

please advise

Briney

 

[mntl]

Decent fans (100+cfm, not walmart fans or low end computer fans) blowing under the lights/on the water will negate the heat the lights alone are adding and probably drop it a couple of degrees. I have a ton of heat/light per gal in my system and I can keep the tank 2-3 degrees below room temp wth just a single 4" 115cfm ball-bering fan (12watts) and my temp controller has to turn it off to keep it from over cooling. It is enough to keep my pendant cool to the touch. It must be blowing on the water suface though, not just at the light.

A reverse cycle would most likely not hurt anything, but the water temp will still be warmer than room-temp due to pumps/skimmer etc, during the day.

-just my .02c

-John-

 

[Briney Dave]

Thanks, I finally got the building crew to examine my air flow into my room. right now I am 10 over the outside ambient temperature. so maybe that will be enough along with the reversing of my photoperiod