Fuel plant growth with a Ceramic Disc Air Stone. It's the best air stone we sell. It'll dramatically increase your dissolved oxygen content - it's ideal for large tanks. You get more bubbles and finer bubbles. You even get a wider spread of bubbles…you can thank the uniform disc shape for that. It's just what you need to boost growth & enhance nutrient uptake. Expect your air stone to have a long life – they’re made from a durable ceramic compound. These air stones are the very best ones to use with air flows of 2.5 – 20 Litres per minute. Other air stones just aren’t as good! The Ceramic Disc is definitely the one to beat.