Reading the packaging, the contents are composted bark, sphagnum peat moss, and pasteurized poultry litter. NPK is .10-.05-.05. Guaranteed analysis is the same as NPK. I sieved it with a 1/4" grid so hopefully that will have taken out the chicken poop. I saw some sticks, mostly.
My question is, "Do I need to fertilize micros with this as a substrate (I have an inch of sand on top)?"