Seachem's N P K : Do they expire ?

[jennfier]

I can't find this info on their website. Does anyone know if they expire ? Thanks.

 

[John N.]

They don't typically expire if unopened, and the shelf life opened is more than a year or two. Most people would go through it before then. Here's a Seachem Rep's reponse in this link and here.

-John N.

 

[Ulan]

I'm not sure what happens with the glutaraldehyde in those products, though.

 

[NinjaPirate]

I imagine they would expire at some point. But even using to dose a single 10g aquarium they only last like 6mo at the recommended dosages.

If you're dosing large tanks or several tanks, you go through them like water, which is why most people switch to dry ferts with large tanks.

 

[jennfier]

I currently use Fleet, Spectracide stump remover and NoSalt. Is there any difference in effectiveness between those and Seachems NPK ? I'm going to order some stuff from bigalsonline.com and was thinking about getting some Seachem NPK to store & try when mine run out... though my Poor Woman's NPK would probably last me another 10 years ...