Im new to this too, and certainly no expert. However, my BP clearly did not like the fine eco earth either. She kept pushing it into her water bowl. I mentioned it to a more experienced friend, and he said that substrate is too fine. He told me it can get in their scales, and irritate them.
I switched to aspen, and ive also used the large coco chips. Both of those did not end up in the water bowl.
I like the look of the fine eco earth. But my snakes didnt seem to like it so much.
And by the way, I never used the kind in the brick. Only the kind thats loose in the bag.