Nutrients mixed with water waiting to be used

Yes if your using whats listing in your diary. "Bio Nova AutoFlower-SuperMix". Its a synthetic nutrient mix which is mineral/salt based and has no organic components. Organic nutrients have live culture and need to be used right away for best results.. I would recommend keeping it covered and out of light to prevent any unwanted growth in your mixture. I keep a pre-mix up to 7 days. Just remember to mix and adjust the PH prior to every water. Good luck and happy growing.

Hello. You will need to reintroduce oxygen to the water/mix for the plants roots. Water left sitting for 24 hours will have about 95% of the oxygen dissipate out. Put a air bubbler in the water for 30 minutes before watering. If the water container is not full all the way then shake it up to get all to oxygen back into the water. I use a electric hand mixer or a bar mixer. It needs to be strong and you need to bend the blade into a propeller that pushes water away. It adds oxygen and mixes at the same time, and it just takes a minute or two to saturate to water with oxygen. Chuck.

Yup. Will be fine. Make sure you have it closed up so there's no evaop. And PH/EC will be the same. If you do have testers (ph,ec meter) just do a simple test. I've held nutrients up to a week and held the same EC/PH. Good luck.

As long as you check and adjust your ph, you should be good to go..

Should be okay