its all good. orca is liquid, great white is powder. I wanted the powder so I can use in coco too. Small quantities edit: I was pretty sure i checked the ingredients before, but i was pretty lit then and I am now, soooo i checked again. lol. there is some overlap. but great white has much more variety than orca in general. so, i'll run all three: hydroguard, orca, and great white. hydroguard active ingredient is inside both orca and great white, but I dont want it to go to waste!