loading pump to big?

[Splitmonster]

I've just installed a second 500 gallon storage tank into the mix. I'm running a Vigas 40 with 1 1/4 main lines feeding the tanks that are plumbed in series. i think i need to upgrade my main loading pump on the back of the boiler. the pump i have now is just a normal 0015 three speed grundfos. it was only $85 all the other pumps are in the $200 range. so my question is that if I'm going to buy a new pump can i get one to big? marc recommended the 0010

 

[velvetfoot]

Would a B&G Ecocirc do it for you?
http://bellgossett.com/pumps-circul...osters/ecocirc-heating-auto-and-vario/#tabs-1

 

[maple1]

Why do you think you need to change pumps?

 

[Splitmonster]

i think it needs to be bigger because the boiler is normally 10-15 degreese hotter than the storage