with planning my move over from my 110 to a 240 gallon, im assuming I prob need to replace the Eheim heater I've been running for the last 5-7 years. I keep going back and forth between what size and if I should run dual heaters. I do have the eheim on an ink bird and its been doing great but with the expanded size and the age of that heater; thought I would get a read of what everyone runs or what I SHOULD. its heavily planted and will be running 1 fx6 -most likely adding a second. thoughts?