Heater won't stay to temp

[Miah2bzy]

I have a jäger 100 watt heater on my 30 that is currently controlled by my reefkeeper. I want to put the reef keeper on my new 65 setup next week and have been trying to gets tank to b stable using the itemp probe and alarms on the temp so I can adjust the heater accordingly.
So far it's not dialed in after a few days if this. Any other suggestions? It's mainly going over, I have alarms for 80.5 and 78.5.

 

[Miah2bzy]

Just for clarification, the heater isn't plugged into the reefkeeper just using it to monitor the temp so I can switch the reefkeeper to the new tank and know this ones temp is stable.

 

[Mccoc033]

If that is the case then I would say the thermostat on the jäger is not exactly stable. I would view a log of the temp and see how far up and down it goes. If it is too drastic then you might want to get a new heater with a more accurate internal thermostat

 

[Miah2bzy]

It's supposed to b accurate to 0.5+- and I got it last year. I might run it against another one to see if it's the heater.

 

[Mccoc033]

Like I said, if you can pull a log from the rke(never owned one) you can just check to see if it's staying within a 1 degree ish range. If it's not then the problem is the heater, if it does stay within a close range, then it might just not be set to the right temp

 

[jda123]

You sure that you house is not getting so warm that the tank is heating up? Is the heater actually on when it is 80.5?

 

[Miah2bzy]

Found my directions to the heater, it's supposed to be calibrated to a true temp before use. Blue ring adjusts temp, red ring moves and isn't fixed as I thought.
No wonder I needed a controller to keep a steady temp....*facepalm*