Review on 🐠 CerMedia MarinePure Block Bio-Filter Media: Ideal for Marine and Freshwater Aquariums, 8x8x4-Inch by Jon Thawngzauk

I've been using this product for many years and I think it's a great product. So why rate 1 star. I just opened the product and found that 1/10th of a block is nothing but crumbs in a bag. Bought for my 3xl 900 Redsea 240 gallon sea water. Because of this, I might try a different product next time. Usually there are crumbs but this time there were so many that I was disappointed. Well, it's installed and I don't want to remove it and return it now.