abc reagents don't expire?

TokenReefer · Jun 18, 2026

Does anyone know what this means? From https://abcreagents.com/pages/contact

Does that mean they don't expire or they just didn't put a date on it?

Neptune says theirs expire in 2 months. The abc bottles I got (a while ago) are not sealed, just capped. Neptune seals theirs...

Apologies if this is not chemistry related; maybe equipment related? Idk

Randy Holmes-Farley · Jun 18, 2026

It is chemistry, and yes, reagents get old. They don't say the reagents last forever, jsut that they do not tell you how old they are.

FWIW, I'm not a fan of this company.

Blitheran · Jun 18, 2026

On Coral Vue:

Technical Specifications

Bottle Size: 250ml per reagent
Shelf Life: 24 months unopened
Storage: Room temperature, avoid direct sunlight
Compatibility: Most automated aquarium testing systems

Return Policy: Due to the nature of chemical reagents, ABC Reagents are non-returnable once shipped.

TokenReefer · Jun 18, 2026

I got these before they partnered with coral vue I believe; so pretty old now I suppose. The trident was offline for a while. Since its been back up I've used Neptune's reagents but when it just ran out I tried the bottle of reagent A from ABC and I'm getting high alk numbers. It would be helpful to put a date on it; whether its accurate or not I have no way to gauge the age; even before it's bought. 24 months unopened...are the new bottles sealed?

OnPointCorals · Jun 18, 2026

TokenReefer said:
I got these before they partnered with coral vue I believe; so pretty old now I suppose. The trident was offline for a while. Since its been back up I've used Neptune's reagents but when it just ran out I tried the bottle of reagent A from ABC and I'm getting high alk numbers. It would be helpful to put a date on it; whether its accurate or not I have no way to gauge the age; even before it's bought. 24 months unopened...are the new bottles sealed?

I mean it would have to be recalibrated if you're using different reagents.