PH bouncing around

In an ideal DWC setup you will set your ph to 5.8 and let your ph swing back up too 6.2. Some nutrients/micros/macros can only be absorbed at a specific ph levels in the range of 5.8-6.2, so allowing it to swing let’s all of them get absorbed. You should see your Ec drop slightly during this time as well. This will mean your plants are up taking the nutrients and water and all should be good. If your Ec rises instead of drops then you are feeding too much and the plants are only taking water and expelling nutrients instead, and you would likely see ph drop instead of raise. So drop your ph to 5.8 and watch your Ec. You should be checking every day and dropping your ph with ph down or something once it hits 6.2. Once you get these numbers correct then you should be smooth sailing. If it jumps drastically overnight then you may have a water issue. Tap water will spike usually during the first day or 2, because of chemical reactions going on in the water from the oxygen and Co2 injection into the water from your air stone. So if your ph swings are happening mainly after you add or change water then it may just be this and no big deal if you stay on top of it. Letting your tap water sit for 24hrs to release chlorine will help with this as well. Hope this helps in some way. Cheers 💨