question about additives

[uclaray]

I came across some old 2-part cal & alk in a cabinet and started to wonder, do additives like 2-part, trace elements, purple up have a shelf life? Do they lose their potency? Are they safe to use? Thanks in advance

 

[Randy Holmes-Farley Verified Community Expert]

Calcium and alkalinity additives have no shelf life (unless they are evaporating).

The main ingredient in Purple Up (the fine aragonite) is not useful for supplementing calcium and alkalinity.

 

[SalinFL]

I wondered the same thing about a couple of new Boyd chemi-pure containers I came across the other day.

 

[Randy Holmes-Farley Verified Community Expert]

ChemiPure is likely fine. I'd just give it a rinse first to take away any possible small molecule organics that might have come off the polymer.

 

[SalinFL]

Thanks Randy. I struggled with the thought of having to throw them away. They are now double the price.

 

[Randy Holmes-Farley Verified Community Expert]

You're welcome.

Happy Reefing.

 

[uclaray]

Thanks Randy