Seachem Prime - Odour

[dazbud]

I've just had a mini cycle in an established tank, so double checking everything.
 
I normally dechlorinate with Seachem Prime. I just happened to notice that the bottle I've been using smells really foul. I've checked Seachem's website and they advise that it should smell like sulfur.
 
However, I have a brand new bottle which smells completely different.
 
I can only describe the difference as ,
 
old bottle = definate sulfur, with hint of spice / mustard
 
new bottle = less sulfur, more like the hyroxide that comes in hairdye or tooth whitening bleech.
 
has my old bottle gone off? Anyone else noticed this?
 
 

 

[mtbdean]

Nope, they all smell terrible!

 

[snazy]

Check the expiry date.

 

[mrcobrajet]

I use the stuff too... It always smells bad...

 

[eaglesaquarium]

Its the sulfur in it... Try not inhaling.
 
 
But, as snazy points out, there's no reason not to check the expiration date.  Its probably fine though.

 

[dazbud]

The expiry date is fine
I meant peroxide not hydroxide btw

Despite the expense I think I will throw the old bottle it smells too different from the new one

 

[misterpro]

My Seachem Prime always smells like something died in that bottle. Usually have to open a window to get rid of the smell after using it.

(sadly) . it's normal.

Perhaps the old bottle only smells worse because it's half empty (and the smell has more space to become airborne even before you take the lid off?) Just a guess..

 

[dazbud]

I've been using the smelly stuff, and it works all the same

 

[tunagirll]

My Seachem Prime always smells like something died in that bottle. Usually have to open a window to get rid of the smell after using it.

(sadly) . it's normal.

Perhaps the old bottle only smells worse because it's half empty (and the smell has more space to become airborne even before you take the lid off?) Just a guess..
 
 

 
An excellent guess - this is most likely the source of the different smell - many more molecules airborne = stronger smell when you open the bottle.