ESV B-Ionic Calcium Buffer System bottles Does it go bad? Found a pair from 10 years ago

[Visuals]

While digging around I found a pair of these bottles from 10 years ago, its used and I still have about half left. Is this stuff safe to does after 10 years?

 

[lapin]

Like wine, it might get better with age or turn to vinegar.

 

[Rmckoy]

Mine barely lasts a month

I’m sure it has expiry dates .

the only other way to know for sure ,
Dose it and see if it increases alk and cal by the value it’s meant to
Put your tank volume , choose esv 2 part as the product and it will tell you how much to dose

Reef Chemistry Calculator

 

[reefiniteasy]

Reach out to ESV and ask. I used bottles after having them sit for 2 years and they are great. But 10... can’t tell you.

 

[RyanN]

I'm using Brightwell reefcode A and B that are at least 10 years old. I started off using a tiny bit to make sure nothing weird happened and now I'm using a few ml's a day on small tank and all is well.

 

[Visuals]

Reach out to ESV and ask. I used bottles after having them sit for 2 years and they are great. But 10... can’t tell you.

Dropped them a message.

I'm using Brightwell reefcode A and B that are at least 10 years old. I started off using a tiny bit to make sure nothing weird happened and now I'm using a few ml's a day on small tank and all is well.

I could test it out like that.