pretty sure the name was changed from zyme to zen- same product, different label, happens alot in this industry when importing stuff from other countries. they also changed the strength on the algean round that time and its stronger now. the veg feed schedule didn't have the zyme/zen , it started in bloom. i started using hygrozyme thru out veg and up till shooting powder starts in bloom..does anyone know why H&G has two enzyme products...one for early in flower and one for late? are they actually different?