Heater help.

[fishbox]

New tank will be around 80g at 48x24x16. On hand I have an Eheime Jager that I know wont do the trick and I have a Ranco controller that is pre=wired with a probe and one plug. I know that I need a bigger heater, but need help configuring it all.
Should i Re-wire the Ranco for two plugs or just run one heater off of it and a separate heater for backup? Maybe use the 125 Jager by itself in the sump set at a lower temp and then a bigger heater somewhere else hooked up to theRanco? Or vice versa? What size heater would you all run with the 125?
Talk to me people

 

[Fabiant15]

Im also to trying to figure out which heater to buy for my Red sea reefer 300xl which is an 80 gal system 65 display 15 sump. I was thinking about getting the new innovative marine heaters but they are out of stock on the 2x200W at Marine Depot

Helio PTC 400 Watt Aquarium Heater w/ Controller (2 x 200W) - Innovative Marine​

 

[Jekyl]

I would have 2 heaters both big enough to do the job on their own. Get a controller that has 2 plugs. Set primary for 77 to 78 and secondary to 76 to 77