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Old 03-22-2014, 07:04 PM   #11
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Two deg Fahrenheit variation in the tank is acceptable. I maintain mine at 80 and 82. Keep in mind that the tank with canopy without vent has tendency to have higher temp. The room temp also contributes to the temp regulation.
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Old 03-22-2014, 07:07 PM   #12
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I agree, two degrees isn't bad, but strive for the least variance you can, my reef varies only about 0.5 degrees at any one time. And being 500 gallons of water those changes happen very slowly.
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Old 03-23-2014, 12:44 AM   #13
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Tank overheating

Here is my sump set up. We only have a two bulb lighting system right now and it's not LED. I was using a Fluval electronic thermometer, E series. Took that out 2 nights ago and the temp is now staying between 80 and 82.. Sometimes it hits 83 but goes back down.
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Old 03-23-2014, 12:55 AM   #14
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Tank overheating !!

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Originally Posted by Gregcoyote View Post
The pump needs to be pretty nasty before it adds tons of heat. Did anyone pickup on the type of lighting and it's potential cause of overheating? Only a few things can add heat to the system; heaters, submerged pumps, lighting and that's it. I guess if the tank set right over a heat vent in the house, that could cause some issues. What is the ambient temp in the house?

First goal, get the temp steady no matter where it is. 82F is high but not lethal. 5deg temp swings are.
This is the set up I have right now. We are currently using a 2 bulb non LED lighting system.. Going to upgrade to a 4 bulb LED.
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Old 03-23-2014, 01:39 AM   #15
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Tank overheating!!

2 pumps are submerged. That will add a bit of heat. Pretty standard setup. What kind of bulbs and what kind of ventilation? Hood, glass top?
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Old 03-23-2014, 02:02 AM   #16
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Right now we have just a 2 bulb system. 1 white and 1 blue bulb and an additional little blue led light on top. We have a glasstop since we have a cat that would love to jump up and go fishing.
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Old 03-23-2014, 02:07 AM   #17
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Tank overheating

Here's a pic of the tank. We are going to get more live rock. This tank was set up for 3 years with a previous owner. We bought it last Wednesday. We kept 3 of the fish that were inside and the live sand. We added our own live rock, and adding more in next Tuesday.
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Old 03-23-2014, 11:15 AM   #18
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With glass top, your tank is like an incubator and you are inhibiting oxygenation. The heat during the night is from your pumps. I suggest you replace the glass top with plastic egg crate you buy at Home Depot or hardware store. There is also a fluorescent light plastic defuser with 1/2 sq in grids.
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Old 03-23-2014, 04:54 PM   #19
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My glass top actually lowered the temp on my tank slightly

I have. A 6 foot tank with PC and t5 lighting and I think the glass barrier is deflecting some of the heat.

I think the ambient temp of the room is as much a factor as anything else.

I keep my house at 74 75 and the tank is a pretty constant 78 79 day or night

I'm on fl and the AC is on 24/7


I would grab the return pump and see if it is hot to the touch

I saw you said you don't have LEDs what do you have?
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Old 03-24-2014, 01:14 AM   #20
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I have a T5 2bulb light system right now. I noticed when I open the glass top, the temp drops a little. I've also cooled the room down and noticed a difference as well. Hopefully it stays at the 78-79 it's been at recently. But I've also added frozen 1 gallon bottles of water to the sump tank so maybe helping the temperature. I only add the frozen gallon at the end of the day since that's when the temp is higher. I'll continue to keep an eye on it and hope it stays at a consistent temp.
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