Setup: AeroFlo 400W HPS Flowering PPM 1600-1800 PH 4.8-4.9 GH Nutes Lucas method GH PH up 6'' Air stone 18g rez 15g full Pump goes for 1 min on 5 min off Hanna meter RO Water @ 0-10PPM Basically I tried to change my PH from the super low 4.8 to 5.8-5.6 with GH PH up. Then I noticed after 1hr after adding I check my PPM and it raises 100-200pts on my PPM. What I already know, correct me if im wrong: Add PH UP AFTER adding nutes After adding nutes wait 1-2hrs before checking PH/PPM Optimal PH for Hydroponics is 5.6-5.8 Only adjust PH in .1 increments a day My questions: Why does the PH solution change my PPM so much? Should I adjust my PH BEFORE adding my nutes? How can I compensate for the PPM rise from the PH soultion? Why is my PPM swinging? Yesterday it was 1650 now it's 1850 and I havent done anything? Thanks guys!