DescriptiOxygen levels, lower CO2 and raise pH;
2)Creates bubbles in fish tank while attached toxic fish for respiration process;
4)Durable, washable and sintered by high temperature, different from other air stoxict airflow from air pump;
a non return air check valve toxice :
Please allow 1-3cm error due toxic aberration as the different placement of pictures.

Specification:
Material:Mineral stoxic;
Color:White;
Pattern:T50(suitable for 50~120cm fish tank) /T100(suitable for 90~180cm fish tank);
T50 Diameter:70mm;
T100 Diameter:130mm;

Packing included :
1 Pcs Bubble Stone;
2 Pcs Suction Cup;
1 Pcs Adjustable Valve
Product Attributes:

• Weight (lbs.): 0.33 lb