Review on 🐟 Sera Siporax Professional 15 mm 1,000 mL, 10.2 oz. Aquarium Filter Accessories: Optimal Filtration for a Crystal-Clear Tank by Tonya Greene

Came without the so-called bacteria booster. I don't think they claimed it was included in this case. He came without a single crushed ring! It works out? I have been using this product for many years and if sintered glass is really that effective then this is the best product. It seems that it does not crumble and does not deteriorate. Not sure if it's better than 30ppi foam or scourer. Everything on the internet is rumour, advertising and unscientific. To save space in your filter, you can stack fragments instead of randomly distributing them.