Aluminium oxide low pressure air stone- Fish farm, large live fish tank, ozone generator, water treatment, plating. - It is composed by the perfect inorganic crystal made by high temperature 1300? with 80% Al2O3 and the average processing rate is 20% Vesicle size is 50~30 micron. It provide the best dispersion ability with the varied molding method and the uniform vesicle density. Also it is superior to the durability and long life and strong against shock because of surpassing the ozone anility in seawater, strong acid and alkali...