The Holdbac culture that I received from you on Friday was lighter than the one I received from you in the last order. They all only have half the weight in the bag. Can you find out what’s going on. I can send you a sample back if require. Please let me know ASAP.

Response : No don’t. Weight are adjusted to activity. Higher activity lower weight. This way 500 DCU does the same amount of product.
Everything is ok.