Reef care super charger

[Tailfisher]

Just found this laying around in tubs of old aquarium supplies. What would the shelf life be as I am getting ready to set up a bio cube and since I have it why not put it to use. Any advise would be great.

 

[hdsoftail1065]

It must be really old, does it have any kind of date on the bottle? I have searched for this with zero luck and I'm guessing you have too since your asking. Personally my view would be when in doubt throw it out. I would pitch it and start new.