It's occurred to me there are prolly differences betwixt coco types.

We're using this Botanicare:
[attachment=o219662]

Wanted to check it against peat for acidity, we had summa this layin' around.
[attachment=o219663]

It's 80% CA sphagnum, 20% perlite. Good stuff, if you need light peat.
[attachment=o219664]

Nuted, lightly Calmag'ed and pH'ed water (bottled / well mix) to 1400ppm, pH 6.3.
[attachment=o219666]
[attachment=o219665]

Ran the water through 1 gal nursery pots filled with:
a) Botanicare coco and
b) Lambert's peat