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Old 11/15/2018, 06:47 PM   #26
HumbleFish
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The Eheim Jager heaters are pretty reliable, just takes some fiddling to get it properly calibrated.

As mentioned above, a Reefkeeper or Apex is a MUST with any heater because when they stick it's almost always ON.


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Old 11/16/2018, 08:17 AM   #27
JMetaxas
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Here is what I think is the best way to protect against disaster:

Have two aquarium controllers, each with their own separate heater, like an Eheim sufficient to heat your tank, independently.

Set 1 controller at your desired temp, such as 77 degrees. Set the heater associated with it a couple degrees higher, like 80 degrees.

Set 2nd controller at a slightly higher temp, like 79 degrees. Set the heater associated with it at 81 degrees.

So, if the heater used most sticks "ON" (which they do), the controller will shut it off. If the heater doesn't turn on (I had an Eheim break the other day. The light was ON, but the heater didn't produce heat), then Controller # 2 takes over.

Yes, it's quite a lot to manage, but this system works and controllers are not expensive.


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Old 11/16/2018, 08:42 AM   #28
ali1
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As mentioned, they all fail at some point. Use two seperate heaters with a controller


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Old 11/16/2018, 08:47 AM   #29
JMetaxas
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Quote:
Originally Posted by ali1 View Post
As mentioned, they all fail at some point. Use two seperate heaters with a controller

I've had a controller fail once. Ive also had the temp probe fall out, keeping the heaters in the ON position.


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Old 11/16/2018, 11:48 PM   #30
WVfishguy
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Quote:
Originally Posted by JMetaxas View Post
I've had a controller fail once. Ive also had the temp probe fall out, keeping the heaters in the ON position.
But, didn't the heater thermostat turn off at a certain temperature? The redundancy failed?


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Old Yesterday, 06:50 AM   #31
JMetaxas
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Originally Posted by WVfishguy View Post
But, didn't the heater thermostat turn off at a certain temperature? The redundancy failed?

The controller never told the heater to turn on. So, the tank just got cold.

If a controller sticks "ON", the heater goes on, but if the controller fails to tell it to turn "off", at least the heater knows to turn off by itself after hitting a higher temp.


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