funky fresh nutes?

if you have left over nute mix(water + nutirents) from about a week or two ago left over (made a gallon, didn't use it all), should you use the left overs if the feeding requirements are roughly the same or should you always mix "fresh" nutes for feeding??

search did not return results, wonder if anyone has questioned this as well, and if anyone has an answer supported by experience or facts

depends on how it was stored.but yeah it should be fine.

stored under the sink, dark & cool
thanks for the reply resinousf,

any other replies/insights are welcomed!