Heater selection, sizing, and controllers?

[new2reefin]

Hi, I'm setting up an IM Lagoon 25 and have a few heater questions. I want to go with two 50 watt heaters for redundancy in case either were to fail. Right now I'm leaning towards either the Cobalt neotherms or the eheim jager's. If I want to put these heaters on a temperature control could I plug them both into the same controller or would I have to get separate controllers for each unit? Any feedback as far as heater selection, sizing, and temp control is appreciated.
Thanks

 

[Big G]

Take a look at Aqueon Pro Heaters. Very highly rated. Lifetime warranty. Very accurate control. No glass to break.