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Old 01-17-2010, 03:13 AM   #1
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Lighting causing heating problem

I am in the process of converting my 125G FOWLR to a reef tank. I just upgraded my lighting to 4 48" VHOs. The problem is it raised my temperature in my tank to about 84 degrees. It used to be consistently at 80 or 81. What temperature is too hot for a reef tank with some fish? I have a clown, goby, dwarf angel right now. I do not want to spend the money on a chiller so my question is what fan would be the most efficient to cool down the lighting? The tank is 60" long and I was looking at 3" or 4" clip on fans. Does anyone have experience with these and what brand is the best? Thank you for you input.
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Old 01-17-2010, 04:26 AM   #2
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No idea about specific fans but really one or two small ones running across the water surface should bring it down and hold it steady.
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Old 01-17-2010, 04:47 AM   #3
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You want your tank sitting around 78f or 25.5c. As Mitchell said, 1 to 2 fans should be enough.
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Old 01-17-2010, 07:23 AM   #4
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But here in Aus you need an industrial-size chiller, aye Danny?
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Old 01-17-2010, 04:50 PM   #5
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I personally think it might be room temps. I have 4 160 watt VHO bulbs and dont have any heat issues. It looks like you are using 4 ft bulbs on a 6 ft tank?
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Old 01-17-2010, 09:24 PM   #6
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Yes, 4 foot bulbs on a 5ft long tank. Is 84 degrees too hot?
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Old 01-17-2010, 09:47 PM   #7
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I think that is at or close to the upper limits of a reef setup. I keep my tank at 82 degrees max. I let my tank fluctuate between 78 and 82 degrees. I use to run a fan and that helped out. If you are hitting 84 degrees now, just imagine when summer comes around. Like I said try a fan blowing over the water. Just remember that you will get a good amount of evaporation and that water has to be refilled daily with fresh, not salt water. I got an ATO from autotopoff.com and have had good service with them, but there are many DIY setups around.
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Old 01-18-2010, 12:57 PM   #8
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The 125 gallon tank is a 6 ft tank. Unless they make a 125 5 ft tank also. I would think you need to lower that. What is the room temp in your tank room?


Ok I see on another thread that he has a 5 ft 125 so I guess there is. You learn something every day.
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Old 01-18-2010, 03:42 PM   #9
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My room temperature stays between 76-78 degrees even during the summer.
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Old 01-18-2010, 06:09 PM   #10
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And BTW the key to temps is stability. As long as temps are stable within a degree or two you`ll be OK. I would try to get it around 78-82 though.
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