Round Air Stone Disk Bubble Diffuser Airstone Hydroponics Aquarium Fish Tank - 4cm Other Education Toys DBP) and features a streamlined

DBP) and features a streamlined

Battery: 2600mAh (included)

Durable & Lightweight: Made from high-quality

Number of Springs: 36 required

Round Air Stone Disk Bubble Diffuser Airstone Hydroponics Aquarium Fish Tank - 4cm Other Education Toys DBP) and features a streamlined1x Air Stone Instructions for use: 1. The product should be left to soak in water for 15 minutes before use. 2. The long term use producing dirt blockage would reduce the bubble; take it out to clean for repeated use. Bubble stone, made by high temperature, durable, good at increasing oxygen levels, high quality filtering, widely used at: (1) fish farms to the eutrophic water environment oxygen, biological cultivation of oxygen. (2) oxygenation in the