Hello I'm very new to this and have sent a couple of blogs but no reply I would really like some help n advice on DWC growing I've just brought a aero 4 master pot system and I'm in a bit of a muddle with ph levels what it needs to be at n once I've tested it the first time do I continue to test on daily bassis or only test when water tank is renewed once a week or so . Thanks for readin please any1 help if u can