Yeah, 5.8 fucked me pretty hard LOL. Have been rocking 6.0-6.1 with fantastic results....allowing a ph of 5.8 every once in a while for a little more access to micro. Only started using coco about, 1/2 year ago....rocked soil for a decade @ 6.0-6.5, or just not phing at all. LOL. Soil is much more forgiving, that is, if you built (rebuilt) the soil correctly. Which has it's own learning curve lol.