storing nutrient fortified water?

so hey, i know everybody says 'dont try to save nutrient water', but i was thinking that storing in the fridge would have to slow down any reactions causing precipitate formation to take place in the water, which im guessing is the reason for not storing it... i mean at least for a few days, right? anyways, i have about a gallon of floragorw/floramicro/superthrive in my fridge right now, just used and made it today, will it hold out until the next watering? prolly 2-3 days.. or should i just make it in smaller batches until i need to up the doses?

thanks

cmon now, im about to go through with this, i really donmt want lockout