I'm growing indoors, with canna coco, and a 5 gallon pot?most important to the question...how will you be growing?
I haven't checked ph or ppm in nearly four years now, don't even own the equipment to do so lol. I've also let my res go up to three weeks with just topping off with tap water with those nutes. I just mix it and they grow.I just use advanced nutrients PH perfect cost more but less worry. I still test my water though to make sure.