2 hydor inline heaters on 1 canister?
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Old 04-09-2013, 06:42 AM   #1
Soup12
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2 hydor inline heaters on 1 canister?


2 hydor inline heaters on 1 canister?

is this okay to do? I am setting up a 120g fatboy amazon theme and want around 500w of heater. Can i attach a 300w and 200w on the same canister?
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Old 04-09-2013, 11:54 AM   #2
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I don't see a problem with it. fail safe if you ask me. However, if both fail they will cook cook you tank. Mine actually failed two weeks ago. Tank temperature reached 90F.
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Old 04-09-2013, 12:57 PM   #3
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Default Re: 2 hydor inline heaters on 1 canister?

The only thing I can think that may be a problem is water going in is not polished yet so you may need to clean the one on the inlet side more often. That is why I've always worried about putting things on the inlet. But hey if nobody here chimes in with first hand, you can try and let everyone know how it worked.
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Old 04-09-2013, 12:59 PM   #4
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Originally Posted by zackariah View Post
The only thing I can think that may be a problem is water going in is not polished yet so you may need to clean the one on the inlet side more often. That is why I've always worried about putting things on the inlet. But hey if nobody here chimes in with first hand, you can try and let everyone know how it worked.
I think the heaters are supposed to go on the outlet tubing (in-line) of the canister.
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Old 04-09-2013, 05:07 PM   #5
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2 hydor inline heaters on 1 canister?

is this okay to do? I am setting up a 120g fatboy amazon theme and want around 500w of heater. Can i attach a 300w and 200w on the same canister?
The automatic on-off switch in each heater has slightly different characteristics. On top of that, the temperature adjusting knob on the heater is not a precise instrument.

This means that regardless of how hard you try, the heaters will always be set to slightly different temperatures. This, in turn, means that if the water is really cold, then both heaters will warm it up. But once the water reaches the target temperature, only one of your heaters will work to maintain it, while the second one will simply sit there idly never activating. This is perfectly fine, as long as your heaters are operating properly. Just keep in mind that one of the heaters in this setup might reach the end of its lifetime before the other.
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Old 04-09-2013, 06:41 PM   #6
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Default 2 hydor inline heaters on 1 canister?

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Originally Posted by andreyt View Post
the automatic on-off switch in each heater has slightly different characteristics. On top of that, the temperature adjusting knob on the heater is not a precise instrument.

This means that regardless of how hard you try, the heaters will always be set to slightly different temperatures. This, in turn, means that if the water is really cold, then both heaters will warm it up. But once the water reaches the target temperature, only one of your heaters will work to maintain it, while the second one will simply sit there idly never activating. This is perfectly fine, as long as your heaters are operating properly. Just keep in mind that one of the heaters in this setup might reach the end of its lifetime before the other.
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Old 04-09-2013, 08:46 PM   #7
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I don't see a problem with it. fail safe if you ask me. However, if both fail they will cook cook you tank. Mine actually failed two weeks ago. Tank temperature reached 90F.
I will have finnex controllers for backup.

Whats the ideal wattage for 120g discus tank (discus like warmer water near 80)

was thinking 500w
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Old 04-09-2013, 08:47 PM   #8
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Originally Posted by AndreyT View Post
The automatic on-off switch in each heater has slightly different characteristics. On top of that, the temperature adjusting knob on the heater is not a precise instrument.

This means that regardless of how hard you try, the heaters will always be set to slightly different temperatures. This, in turn, means that if the water is really cold, then both heaters will warm it up. But once the water reaches the target temperature, only one of your heaters will work to maintain it, while the second one will simply sit there idly never activating. This is perfectly fine, as long as your heaters are operating properly. Just keep in mind that one of the heaters in this setup might reach the end of its lifetime before the other.
interesting, so maybe kind of pointless to have 2 heaters...
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Old 04-09-2013, 08:49 PM   #9
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Default Re: 2 hydor inline heaters on 1 canister?

Just a thought not sure what canister you have but you may be able to split to two outlets from the single. Not sure what canister your running. I'm guessing a big one if its for a 90. Just an idea.
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Old 04-09-2013, 08:51 PM   #10
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i havent picked a canister filter yet. I am kind of thinking about a sump now, but they are kind of loud.
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Old 04-09-2013, 08:57 PM   #11
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If you're gonna use a sump, why not just heat the sump and not fool with the in line heaters?
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Old 04-09-2013, 08:59 PM   #12
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Default Re: 2 hydor inline heaters on 1 canister?

Well if you plan to do canister I suggest 2 that way you can do both of your heaters inline plus lots more media options. And you can service One at a time and filteration is still going. I run an ehiem 2236 and a jbj reaction 45 on a 55 long. I love the heater. As far as a sump I don't like the noise either.
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Old 04-09-2013, 09:17 PM   #13
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Originally Posted by Sugardaddy1979 View Post
If you're gonna use a sump, why not just heat the sump and not fool with the in line heaters?
well of course I wouldnt have inline with a sump
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Old 04-09-2013, 09:18 PM   #14
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Originally Posted by zackariah View Post
Well if you plan to do canister I suggest 2 that way you can do both of your heaters inline plus lots more media options. And you can service One at a time and filteration is still going. I run an ehiem 2236 and a jbj reaction 45 on a 55 long. I love the heater. As far as a sump I don't like the noise either.
interesting with running 2 canisters with separate inline heaters on each.
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Old 04-09-2013, 11:13 PM   #15
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Originally Posted by AndreyT View Post
This means that regardless of how hard you try, the heaters will always be set to slightly different temperatures. This, in turn, means that if the water is really cold, then both heaters will warm it up. But once the water reaches the target temperature, only one of your heaters will work to maintain it, while the second one will simply sit there idly never activating.
This is not entirely true. I have two tanks in my office, both running 200w inlines. Something in the thermostat in these heaters is sensitive to voltage changes in the house main, and they can turn on at the same time. I often hear clickCLICK as both fire up within milliseconds. One is on a 20g, the other is on a 50g, so it's impossible that they're both dropping to the same temperature at the same time so consistently. I'd imagine that if you have both running inline on the same tank, even if the mechanics of the thermostat are set at slightly different temperatures, they may still turn on in unison and heat the water together.
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