My LHBS is more Health Food Store than LHBS, so advice is limited. While I was in there today I decided to get some Irish Moss to put in inventory for later. I was faced with the choice of a coarse irish moss, or a fine powder style. Having no recent experience with Irish Moss, I made a selection based on logic. (my logic, and probably flawed). I choose to get the powder style and not the coarse stuff, thinking that the larger surface area offered by the powder would increase its ability to clarify? Did I choose right, or did I waste a buck sixty?