Dry amendments

I tend to run canna terra professional, and i use biobizz grow/topmax/bloom nutrients and in heavy flower advanced nutrients organic big bud, and lastly ecothrive biosys microbes.

whats the best dry amendments for phosphorus and potassium. And how much do i add to my 5 gal fabric pots ? And what sort of air pump do i need for say a 5L bottle of feed/microbes for a compost tea