can i still tag igersmanila on an already posted photo?

Yes please, keep the good vibes rolling in Instagram!

Carl C. Lozano or CCLozano is an Operations Management Professional, currently the GM for a Telesales and Customer Service company; founder of @IGersManila, one of the pioneering communities in Instagram, open to Filipino Instagram'ers (IGers) and phoneographers around the world, with its longest running photo challenge - the #IGersManila #9pmhabit - becoming the daily visual storytelling habit that continues to yield positive interaction online and offline.

http://cclozano.com