Pawfly air stones are made of high quality non-toxic mineral material With high temperature sintering the stones are sturdy and durable have high dissolved oxygen rate and create even and tiny bubbles rather than a limited number of large ones

Medium Bubbles: With lots of micro holes on the air stones which allow abundant dense bubbles to spout from the cylinder An ideal way to oxygenate your tank and enliven the aquatics Model: ASc100 Jetting volume: 5 Lmin Recommended air pump power: > 7 W Standard ID airline tubing: 316 great for aquariums DWc systems or ponds Reliable Material: Made from durable and washable silicon carbide it causes no effect to the health of your aquatics Help keep fish or roots growing healthily Stable in Water: Each cylinder measures 2 D x 4 H and weighs 08 lbs It can easily sink to the bottom and stand stably in your tank for steady bubbles Easy to Use: Soak the stone completely in water for 1 hour before use clean it regularly with a brush as it gets clogged after weeks or months of usage