Use it in the rest of the garden it is best used quickly.
It is good to start planning your spring garden now, putting out compost and mulch, maybe sow a few seeds like lettuce or other crops that like to pop up as winter breaks.
I wouldn't bother steeping the tea more than 24 hours, you pretty much reach as much multiplication as you are going to, by then.
How long before it is detrimental to the garden, when does it become toxic?
Using it on lettuce or other veggies is not a problem they need nutrients too,
however they are not my primary concern.
If compost is used years after it is started what is the urgency to use a tea hours after it is
bubbled? If brewed today will it be effective next week? next month?
Is there a shelf life where nutrient tea is no longer beneficial to use?
I don't question your input, I just want to understand the process.