For my PDF tanks and the potted plants in the tree frog enclosures:
I use ABG ( from Josh's) w/ a few little modifications:
I always break up the sphagnum ,even remove some of it ( it never seems to be milled enough)
I add aquarium/filter activated charcoal.
I add additional slightly crushed leaf litter

After it's modified ..it is stored in a ( non air tight) plastic container

I add this modified soil as needed into the enclosures from time to time

I dampen the soil prior to adding it

This same exact soil is used in my springtail and isopod cultures
The only differences is ..........there are additional -BIG -chunks of charcoal and ( un-crushed) leaf litter in the culture containers
I do not separate springs and ispopds -
I feed them different food ( green zucchini for the pods and yeast for the springs)