NEF-2100+  (Light shade tone) and NEF-2200+ (Dark blue shade tone) from BBT are all stone free enzyme.

Both these two enzyme can be used directly for enduser or be dilluted to be used for enduser.

These two products will show very good results when user added NP-13 with them.

If need save more water, can spay one of these two products (after diluted is better) and NP-13 on the wet jeans which did desizing already. It will be running 45~50 mins then bleaching.