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allenjj

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Location
Albany, NY
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Heaters

My new system has 400 gallons total with 180 in display and 220 in basement sump and refugium. I added a 300 watt heater at a time until i could maintain the correct temp, then added a 150 watt heater for refugium. In total I now have 5 - 300 watt heaters (and one 150) which are individually controlled and as a backup, controlled by the temp sensors on my apex controller. Even on very cold nights I now have less than 2 degrees variance in temperature. Hope that helps.
 

pecan2phat

Professional Commuter
Location
Wallingford, CT
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I use two 500w titanium heating tubes for about 300g total volume where the sump is in the basement. This has worked well for me in the past 5 years so for 400g, I would add a third 500w tube to bring the total to at least 1500w or better. Depending how cold your basement gets, you might need to go up to 2000w of heat.
 

ClownAquatics

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Location
New Jersey
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I would see what the recommended heating wattage that is needed and start with that. Then someone said earlier, if you need more then add more.

I also agree with what others here have said. Whatever total wattage you need, split that in half and buy 2 sets of heaters to cover the total amount.

So if you need 600 total watts, then get 2 300w.

Best option to have a little security. So if one heater breaks and stops working at least you have the other to heat. And if one has the controller break and stays on, it is only half the power, and hopefully you will catch it before it boils your fish :)
 

Dace

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Location
Manhattan
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I always recommend some type of redundancy on the heating system to a tank. I have a ranco controller which is plugged into my Apex in case the ranco gives out which i've never heard of one going bad get getting stuck on.
 
Location
Bronx, NY
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I use an 800 watt titanium heater on my 450. The thing is, with a tank that size you are going to be getting so much heat from pumps and other things that the heater never even turn on. I was surprised the other day when my chiller kicked in, in the middle of the winter.
 

Dace

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Location
Manhattan
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I use an 800 watt titanium heater on my 450. The thing is, with a tank that size you are going to be getting so much heat from pumps and other things that the heater never even turn on. I was surprised the other day when my chiller kicked in, in the middle of the winter.

Hmmmm. I wonder what kind of pumps your using. I had a hammerhead and a dart and they could not raise my water temperature where my chiller would come on in the winter ever. I would think the heating in your house or apartment had more to do with that.
 
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sunny

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Location
New Jersey
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Indeed, it is weird about the chiller in winters. I would go with multiple heaters just for redundancy. I have a 600G volume and I use 5, 300w Ehiem Jagers.

I have 250G in the basement and it is cold down there. The heaters do a good job to keep my tank at 78 degree.
 

allenjj

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Location
Albany, NY
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Heat Stability.

Im happy to say, in viewing the new Apex graphs that the heaters in my tank are now maintaining temp at 1/2 degree variance per day. Its really cool to see a weekly graph and that my parameters are stable. I probably have more heaters than actually needed, but do like the redundancy in the event one fails. Redundant controls with the apex hopefully protect the tank from a heater sticking on. I have a hammerhead gold pump, 4 tunze and 2 pumps on octopus protein skimmer and they dont seem to generate enough heat to make any difference in 400 gallons of water.
 

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