hit the nail on the head it is realy good to use, wheather its 80/20%perlite or like im about to try 50/50% it dont mater
as long as you con sider the following:
a course medium like perlite or expanded clay, would be expected to have a different watering programme to that of a fine medium like coco, or peat, so the more drainage the more frequency of watering is required, the less drainage the less frequent
Is the coco it self expensive i really lookin forward to try this now