wife called and said the heater was still going and tank had got to 77.9 degrees. I had moved the dial to 80 on the heater from the factory setting of 78/79 so I might need to turn it down a hair when I do get two heaters going. Pretty much every one of the T series heaters has been set to a factory setting that got me 79 to 80 degrees perfectly. At least this series of hester actually heats, whereas the Fluval E series would just show a cold water error and not even heat up the tank.
The whole increase in heat is also in line with my future stocking of my 300 with the clown loaches which are said to do better with the slighter higher temps rather than cooler.
So far really liking these Fluval T series. After this heater comes in on Saturday, I will need to replace the heater on my 90g goldfish tank and purchase one back up heater to keep in the event of an emergency.