Rez circulating with meter in therefor 5 mins to stabilize, also taking readings without mixing, ph shows the same for both readings. Recalibrated meter last week it was high by .4 but now it’s on point. Still issues. Flushing lines with RO is not a bad idea at this point. Have been collecting samples from dripper and they show a whole 1 point above the rez.
I was using citric acid and now I am using sulphuric I made with RO and battery acid. Mixed at low ratio so it’s easier to pinpoint without overshooting.
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I ran the whole line before and plants loved it. I was using citric down and bennies at the time and my rez would get murky in 24-48 hours. I tried using less add ins this time to keep the res cleaner and it has helped. I still have some of the components I can use, they are a year old by now though.
Rising that much is common with citric. Sulfuric should hold pretty much dead steady.
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