Mash tun size for 10 - 12L batch

[geovdw]

Hello everybody I am new to homebrewing and I have doubt about what to do.
The problem is that I don´t have a lot of options for a mash tun.
I found a water cooler for 12L, is this big enough to mash to make 10 12L batches?
I read that it is about 50% (6L) strike water and afterwards 50%(6L) sparge water, what do you think should I buy this one or search for another cooler.
here is a picture;

 

[Fordzilla]

The "Can I Mash It?" tool below is excellent for this. Look up a recipe for the highest ABV beer you'd want to make, and use that to determine if the mash tun is big enough for you.

http://www.rackers.org/calcs.shtml

 

[geovdw]

thanks for the tip, will check it out