Question about old water conditioners

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Laser

Aquarium Advice Addict
Joined
May 13, 2006
Messages
1,218
Location
Michigan
I found a bottle of start right and a bottle of stress coat at my grandmothers house from back when she used to have aquariums. They're both big bottles of it so I'd like to use it if I can. I didn't see any expiration date on them and they're both nearly full though neither one of them were sealed. So my question is are they safe to use and will they do the job as well as a newly purchased product?
 
How old - years? Decades?!?!
I would use an open bottle if it was one or two years old. Any older than that, I just wouldn't take the chance.
 
Yeah, it might be turning 10 soon hehe...

I'm sure it has outlived it's shelf life by now.
 
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