ZHIZHI AIR STONE IN PAKISTAN

we, zhizhi air stone co .,ltd , manufacture air stone in china. if you want , look for it at our website: www.zzaquarium.com. They produce a uniform medium/fine bubble and are very resistant to clogging. And when cleaning does become necessary because of a buildup of calcium precipitate or bacteria, an acid bath restores them to like-new performance.Air diffusers are compatible with economical low-pressure blowers. diffusers are the highest-quality ceramic-type air diffusers on the market today.They're machined from a solid block of glass-bonded silica. Because dust and dirt particles up to 30 microns in
size will pass right through these diffusers,
there's no need for expensive air filters.And with an air resistance of less than .25 psi,