Coral Rx w/o expiration date?

[Christopher]

Hey all, I have a bottle of coral rx pro and 3 of the single shots with no expiration date on them. I know I have had the bottle for at least 2 years if not more and the single shots I received from a fellow reefer shutting down last year. Anyways anyone know what the shelf life of the product is?

Thanks

[Slyguy00]

Mine is expired and i still use it. Seems to work great still.