I've actually raised the ph up to between 6 & 6.1 around 2 - 3 weeks ago, but I haven't checked run off ph ever. I didn't have the need on my 1st coco grow.
Hmmm... I’d go up to 6.2, lower the mag a bit and add a little more cal. That’s me tho.. probably best to wait for someone with more coco experience.
Mine are on 1ml per litre of cal and mag at the mo.. I think that’s more than your 4ml per gallon isn’t it?
I’m not great with imperial measurements! [emoji23]