Review on Enhance Your Aquarium with Seachem Fluorite Onyx Sand Substrate: Unveiling the Incomparable Aquatic Bliss by Niropa Heinen

I STRONGLY recommend rinsing this sand thoroughly and then rinsing again. Because the cloud that appears when you disturb the gravel will kill your fish. I just lost two of my rare fish to this crap. I washed and washed. I lost half to runoff, then did 3 full water changes, ran a sponge filter, used a gas station, used a stabilizer, waited a week and landed the fish. Then I changed the water again and BAM the dust cloud came back and last night my fish stopped breathing. THANK YOU SEKHEM