Glad to hear it is working out for everyone, so there is no problem with the plan
I will double check the heater, that is all I can think of the problem is. It is a brand new 250W. I am pretty sure there was no air pocket in the module. I also installed a light indicator. It did turn on and off, but it turned on before the water temperature dropped to the set point. I am not sure if it was the fault of the heater or there was something wrong with the enclosure. I will test the heater alone later on. I only use this to heat up the water when I do water change so it is not a big problem for me, I am just curious of why it did not work as intended. I have a Hydor 300W inline plumbed in the system. Thanks for the help everyone.