Can you keep made up nutes in a bottle?

Curious as with baby's your only using a couple shot glasses of nutes at a time, can you just keep it in a bottle and shake it up before you use it? Or will there be no oxygen in the solution?
Or just have it in a res or bucket with a air stone or pump to keep it moving.
I only ask cos on a bucket with a air stone the pH gets to 6.4 after a day. In the 150 litre res the pH doesn't move much but I can't make up that much just for baby's. And it's a pain doing the pH every time I need to use it.

Make your solution 1L at a time.

edit: plant more seeds

HydroKid239 said:

Make your solution 1L at a time.

edit: plant more seeds

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Ah yeah so just make up a fresh 1L each time?

Orblight said:

Ah yeah so just make up a fresh 1L each time?

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It beats wasting a gallon. You can put an air stone in your mixed leftovers. I’m not sure exactly how long it can be kept. Probably depends on the brand. Most I’ve heard someone keep leftovers oxygenated is 1 week with fox farm nutes.

Ideally you want the water to be fresh and well aerated. If its less than a few days then it should be no problem. One thing that can help with aerating the water is using a shower head style watering can too. Air Stones can mess with pH and cause some nutrients to cloud up in my experience.

I mix up 5ltr tub and use it to the end, the only downside I've noticed is the ph needs regular correcting with small amounts.

Deppending on how many plants I'm flowering I can get 7/9 days from a reservoir fill with 2/3 ph correction over the duration.

I make my water like 72 hours in advance using air stone and recirculating pump to keep water agitated but keeping the mix already made I don’t see why it would be a problem as long as you aerate it and shake it up good once and while

I make mine up in 5L batches, to use straightaway. From time to time I will have a little left over, maybe a litre. I'll save that and use it the next day, but I don't make it up in advance.

I mix 20 ltr buckets regardless of if I'm pouring the whole thing into a res or hand feeding small ones all week.

I wouldn't use an air stone to keep it aerated, I'd just use a water pump that disturbs the surface.