Yes , in flower food is put a bacteria killer , which help to keep the water clear. https://centimo.nl/product/postharvest-preservation-liquid-anti-bacteria/%E2%80%8B
It is specially developed to all kind of bacteria in the absorbable flower dye solution. The Centimo post harvest works longer and better than any Chrysal/ floral-life product . So you can use it on every flowers as a post-harvest product.