nope its not miracle grow stuff
the sand i use is
ok................so exactly what problems are you having? im not really seeing anything in what you have said that raises a red flag in my mind as causing an issue.......
Add 1 part or even more perlite. I use coco peat/coir, assuming that's what you mean by coco fiber, but have to say I use it for seed starting and won't use it in a long-term potting mix. In my opinion, it isn't a good long-term choice because it seems to break down to goo awfully quickly, meaning within a matter of months.
Bruce in CT
Madness is something rare in individuals — but in groups, parties, peoples, ages it is the rule. Friedrich Nietzsche