looking phenomenal alt0.
ive been doing my fair share of reading in peer review journals. the acidity rise you're seeing is completely normal. if you dont want to add so much ph down you could go to a home depot and grab a bag of limestone. wash the stones off first to make sure excess powder doesnt get mixed in with the nute solution. the limestone will add a bit more calcium to your solution but will also naturally keep the ph down. a buddy of mine did it and it worked great. if you decide to go this route, add the stones to your res tank about a handful a day. if you add to much, you could shock this plants and drastically change the ph. so add a few limestones, give it an hour and check the ph, then add some the next morning after you have checked the ph again.
