I will second that. Peat pucks.
I was growing rain forest tropicals. Its great for plants that like to stay moist. Then I started into desert tropicals. Even starting tomatoes and such for the garden.
When peat gets dry it sheds water. When its wet it tends to stay wet.
I swaped to coco pearlite clay pellets and local rough pea gravel.
I still have half a bail in a storage bin.