Is this allowed? Can I Put 250x250 adsense banner + 250x250 someother ad network on the same page I am not sure is this breaking google TOS? If any one can help i would be grateful! Thanks
No problem. You can use any other network ads along with adsense. Just keep in mind one thing, the other ads should not the same style of adsense ads. Before you going to place other ads, you need to confirm whether the ads script can conflict the adsense ads script or not in future.
as long as ad-format is not like google, they dont care and that is clearly stated in their terms page.
You can put other ads on pages with adsense ads as long as the other ads don't look similar to adsense ads.