Product Description Bio Filter Media Balls: * The bio balls are fired by high temperature. * Full of rich variety of natural elements and essential minerals and trace elements. * Encourages growth of biological colonies and holds large amounts of good bacteria. Great help to restore the natural water quality, and provide the most suitable living environment for your fishes. * Suitable for fresh water and sea water tank. * Reduces ammonia and nitrate levels. Items Data Items Data Items Data Water adsorption 42.09% PH 7.1 SiO2 92.14% Volumn density 1.49g/cm3 Al2O3 0.66% Fe2O3 0.18% Compres sive strength 6.89N/mm CaO 1.86% K2O 0.28% Porous ratio 48.21% MgO 0.58% Na2O 4.01% Detailed Photos Our Advantages Aquarium Filter Material Aquarium Filter media/house aquarium clean Feature: 1. we have different size for ceramic rings 15mm 2. Works with all filters. Canister, hang-on filter, wet/dry, pond filters, DIY filters 3. Quartz Ceramic Rings filter media,which uses natural mineral and quartz powder as its materials,is produced through high-temperature calcination.With the wide specific surface,high porosity,strong pollution cleaning ablitity,super unique micro-pores and natural mineral elements,Glass Ceramic Ring provides a favorable environment for beneficial bacteria-aerobic bacteria and anaerobic bacteria,which are the two main necessary bacteria for the water purification of aquaculture.All these contribute to water PH improvement,oxygen content stabilization and successfully restore the water to its original crystal clear state. FAQ Q: Are you a trading company or a manufacturer ? A: We are a manufacturer. Q: How long is your delivery time? A: Generally it is 5-10 days if goods are on stock. if not, according to quantities, it takes 15-20 days . Q: Do you provide samples ? is it free or extra ? A: Yes, we could offer samples free of charge but the buyer needs to pay the cost of freight. Q: What is your terms of payment ? A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance, 70% before shipment.