How to Keep temperature DOWN? - The Planted Tank Forum
 
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post #1 of 14 (permalink) Old 08-07-2010, 03:22 AM Thread Starter
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How to Keep temperature DOWN?

So I have a 65W PC over a 20g long tank. I blast the light for 9 hours a day and the temp. goes up to 93F!

How do I keep it down?
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post #2 of 14 (permalink) Old 08-07-2010, 03:24 AM
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Move the light further away.
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post #3 of 14 (permalink) Old 08-07-2010, 03:26 AM
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What is the ambient temp in the room?
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post #4 of 14 (permalink) Old 08-07-2010, 03:44 AM Thread Starter
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Yeap looking for mounting legs right now. The light is a Coralife Aqualight Deluxe, did they discontinue the legs for this light?

And room temp is really the issue. We don't run the AC during the day.
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post #5 of 14 (permalink) Old 08-07-2010, 04:02 AM
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That's way too hot, and if you're turning the A/C on when you get home you may be getting some temp swings as well. You may have to just bite the bullet and leave the A/C on all day, even if it's not at as cool a temp as when you're home.
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post #6 of 14 (permalink) Old 08-07-2010, 11:30 PM
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Since high temperatures are a fairly short term item for you, I would suggest a short term solution. Acouple inches of free air space between the light and tank will do wonders for the water temp. A couple 2X4 blocks for temp?? Open any lids on the tank and get more cooling from evaporation. One word of caution for any folks thinking of turning the heaters down on the tanks. Temperature swings at night can really ruin fish. Better to leave them set normal and then deal with the heat from the day in other ways.
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post #7 of 14 (permalink) Old 08-07-2010, 11:49 PM
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No one has suggested fans or a chiller?
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post #8 of 14 (permalink) Old 08-08-2010, 12:17 AM Thread Starter
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Originally Posted by epicfish View Post
No one has suggested fans or a chiller?

Chillers are too expensive. What would be a fan solution?
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post #9 of 14 (permalink) Old 08-08-2010, 12:35 AM
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Something like this:


http://aqua-ca.com/AquatekCoolingfan.aspx

Azoo sells a similar fan.

Or...


A clip-on fan.

Or even a box fan pointed at the tank will help keep the temperature down.

But with evaporative cooling, you're going to get evaporation in your tank and will have to consistently add more water.
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post #10 of 14 (permalink) Old 08-08-2010, 01:16 AM
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Get a fan and top off every other day. Evaporation can reduce temp at least 5 degrees from my experience. Between the fan and raising the light you should see a decent reduction in temp.


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post #11 of 14 (permalink) Old 08-08-2010, 01:48 AM
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Yup, fan on water surface will cool a ton. Moving the lights up a few inches will help a ton too.
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post #12 of 14 (permalink) Old 08-08-2010, 01:54 AM
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Fans tend to help a lot more in places that have low ambient humidity.....
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post #13 of 14 (permalink) Old 08-08-2010, 02:11 AM
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fan will only help if the room is cooler than the tank how much of that heat is the light and how much is room temp.
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post #14 of 14 (permalink) Old 08-08-2010, 03:51 AM
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I have a fan that I connect to the same timer as the lights. That way when the lights are on the fan is on as well. It helps to reduce the water temp about 4-5 degrees F. The negative is that there's more evaporation.


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