I bought a house with a hot tub in it. There is a box full of BioGuard chemicals that the owner told me were about 8-10 years old. Most are nearly full. Can I still use them? Are BioGuard chemicals any good?
Thanks

Oh, I have two filters that are the same age as well. Will they be ok?

The tub was hardly used and not at all for about 8 years.

yep, use 'em up! You shouldn't throw them away.