issues with heaters, need help

[saltyESQ]

I am in the process of cycling a 24g aqua pod

it has a 70w HQI

b4 I put a heater in, the water temp would be at 70 degrees, even with the halides on all day.

Wanting to get the temp up, I put a heater in the rear pump compartment. I set the heater to 78, but the heater continued to heat up, so I lowered the heater to the lowest setting and it still heating way past 78.
So I went out and bought another heater and it is doing the same thing?

any ideas?

 

[discus010]

What kind of heater do you have? Do you have a thermometer with a probe? If so, is the probe located near the heater? This can cause incorrect temperature readings if it is. BTW when was the last time you checked for the thermometer's accuracy.

 

[phatphisher]

unplug your heater and let it sit in your tank for at least 15 minutes. this will allow the heater's temp control to adjust to your tank's temperature.