Advertisement Recently I purchased and added flourite sand to my cichlid tank, but I've got about half a bag left. This is the exact sand I have in my possession. My question is, for scorpions who need sandy substrate will this be safe for them? It says: Fluorite is not chemically coated or treated and will not alter the pH of the water. Seachem Flourite Planted Aquarium Natural Substrate Supplement is a stable porous clay gravel for natural planted aquariums, and may be used in any aquarium environment. So no chemicals is a good start but the clay gravel part gives me pause. I'm too new to scorpions to know if clay is good, bad, or doesn't matter one bit. I'd rather get some experienced people's opinion on the subject. Has anyone used this or something similar? It's not a big deal to get different sand in the future if need be but it'd be great to find a use for my leftover bag of sand. Thanks for your responses and time in advance!