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Old 10-27-2005, 05:25 PM   #1
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Heater has not enough capacity

My aquarium stays at about 78F although I have it set already on 82F. Ok, I got a 70 gal with a 250W heater. After that 5wpg rule for heater I need about 100W more.

So how do you guys do that? I havent seen a 350W heater so far. Can I just add another 100W heater and it'll be fine? Sorry , never had such a "big" aquarium .
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Old 10-27-2005, 05:43 PM   #2
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I have two 300 watt heaters running on my 75 gal. I would suggest doing the same. It helps balance the entire water column and doesn't put a strain on one.
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Old 10-27-2005, 05:48 PM   #3
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Also, when using 2 heaters, get the tank to the temperature desired, then turn both the heaters up so the pilot lights go on. THen slow turn each of them down until the light goes off. That way both heaters will be set at the same temperature, and you don't have one working away to raise the tank that 1 or 2 degrees, and the otherone only kicking in when the first has been working away and failing at raising the temperature.

I want a 75 gallon now. And i haven't even gotten my 44 yet :-(
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Old 10-27-2005, 05:57 PM   #4
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@Jchillin: WOW, two 300W 8O ? I guess I really need to get another heater!

@sudz: Thanx for the tip, sounds like a great idea !
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Old 10-27-2005, 10:10 PM   #5
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I disagree. 250w should be plenty.
ime a 300w is plenty for even a 120gallon.
have it near your filter "out" flow and it'll get to the entire tank pretty quickly.
just my thoughts anyway...

Matt.
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Old 10-27-2005, 10:40 PM   #6
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The general guideline is 5 wpg. I would use two heaters of the same (or close to) watts. As mentioned by sudz, the one heater won't be working so hard. We have three 250 Watt heaters on our 150 gal tank.
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Old 10-27-2005, 11:39 PM   #7
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WOW, First time I heard the 5WPG rule for heaters, Is this true I only have two 200 watt heaters in the sump on my 210. Keeps it about 78'F now that the temp is dropping into the mid fourties at night. Um, who sells a 1000 watt heater?
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Old 10-27-2005, 11:41 PM   #8
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The idea behind having two is not only for balance, but in the event one decides to fizz out on you, you won't lose your temp setting.
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Old 10-27-2005, 11:45 PM   #9
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Quote:
Originally Posted by lemonheadmech
WOW, First time I heard the 5WPG rule for heaters, Is this true I only have two 200 watt heaters in the sump on my 210. Keeps it about 78'F now that the temp is dropping into the mid fourties at night. Um, who sells a 1000 watt heater?
What size is your sump? Your heaters are probably enough for it. One of the other reasons for the sump and heating at that location is you have a constant flow, thereby maintaining the temp in the tank.
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Old 10-28-2005, 12:08 AM   #10
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What size is your sump?
JC its a 30 gal turned into wetdry/sump. Its got a pump chamber, chemical chamber, and the other half is the bio filter with the mechanical filter mat. Take a peek picture in gallery.
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