Hi im fairly new here been doing lots of reading up , i gotta a question for you coco growers, i been growing in coco for a few years getting great results , run to waste and hand watered , the problem i sometimes have is i putting in 5.8 PH but some times i get readings 6.7/8.9 run of and no matter of flushing will bring it down, also i sometimes get what looks like magnesium def a few weeks into bloom , my leaves getting necrotic patches on them, i was just wanting some info about this , i use canna pro+ and i know flushing can mess up the buffers , but what can you do to bring it into range , ive done all the obviuos things to try to fix to no aveil , i still smash out nice crops im just a bit miffed by it all, any help would be appreciated, thx.