Nan Optipro user

Ay, common yan sa babies especially pag nag-adjust pa lang sa formula, kaya don't worry too much! Green and watery poops are usually okay kung active pa rin sya, gaining weight, and hindi sya irritable, ang dami ng moms around me na dumaan dito with Nan din, tapos after a few weeks nag-normalize na. But since your baby is still very young at 1 month, I'd really suggest checking in with your pedia just to be sure everything is settling well, lalo na if you notice other changes like fever or kung parang uncomfortable sya.