Old bottle of Mayhems Ultra Pure H20, still ok to use?

[AFK_Matrix]

Hi,

So my watercooling needs topping up and I have this old bottle of Mayhems Ultra Pure H20 and its probably getting on to be 2 years old. Is it still ok to use this in my system or should I buy a new bottle?

Thanks.

 

[mods1965]

Check the bottle label. Mine say they can be stored for 3 years in cool, dry environment out of direct sunlight.