Aqua Nova Zeolite are a high performance filter material that effectively: absorbs ammonia from your aquarium to extend time between water changes and keep fish safe helps stabalize PH absorbs heavy metals and nitrous compounds
Standard 4mm (inside diameter) universal air line tubing. It is ideal for use with airstones, air-operated ornaments and air-driven filters. Length: from 1 meter up to 100 meters. Select the number of meters that you need - you will get it in one piece. You choose what discount do you want. 2 meters - 2% OFF, 3 meters - 3% OFF etc. Up to 20% OFF! Enjoy!