PH runoff 5.2 How can I raise it ?

If your EC going in is lower then the EC coming out it is not using all the nutrients and you need to give it less with a bit more runoff 10-20% pots volume. Ideally your runoff will be higher for the first bit coming out of the pot. But you want to let that go to waste and measure after at least 50% of your desired runoff is thought the pot. This is the number you should be basing it on. I have a little cup I collect it in and measure. I find with my growing style anytime I grow in just peat moss it always drops in PH and I can not get it back up, some say its from something growing in my medium like a bacteria or fungus. I feel it might be from the peat moss breaking down and turning acidic as that what it does and I use a lot of microbes to help in my grows and they break shit down. If the plants are looking good, don't worry to much about it. they seem quite healthy in terms of a PH standpoint. They look as if they are getting overfed with the super dark green leaves. but that could just be the lighting at the time, but I also see some slight tip burn so keep an eye on it. and with less EC in the medium its PH should drift up a bit.