Storing Nutes

I was wondering, if when I mix all of my nutes together with a gallon of water (I use pretty much the entire fox farm line), and I have this nice fert already made, and I have extra (about a half gallon), is it okay to store this already made fert to use for the following week? And if so, how should I store it?

can but not recomended at all mix fresh when needed taking a risk otherwise.