Is one sump pump enough for a 155g with dual overflows

[Galaxie500]

Hey people,

I just picked up a New-to-me 155g Bowfront. It came with a sump and is pre-drilled for dual overflows.
The sump is about 20g
The included pump is a Triton 4 by "Deep Blue"
THe pupm pushes out 1050gph (gallons per hour)

My question is if I split the output of the pump through 3/4" hose to both the overflows would that suffice? or do I need to purchase a second pump?

BTW the input from the overflows is 1"

thanks,
Galaxie

 

[Galaxie500]

bump

 

[breakspirit]

All I can say is that my tank is 125 gallons and I use a 30 gallon sump under it. It has 2 quiet one pumps, which you can check out here:
http://www.amazon.com/Quiet-One-Lif...qid=1355697593&sr=8-1&keywords=quite+one+pump
There are 2 return lines, each is 1" and reduces to 3/4" at the tank I'm pretty sure. Each return is fed by its own pump.
I've also got 2 overflows, each is 1.5"
I feel like my setup is very much overkill for my tank size, but you can use it as a reference if you wish.