Uxcell Aquarium Column Release Bubble Air Stone This Releases Bubbles Stone is ideal for fresh water and sea water, so is suitable for filtration, ponds aquarium and hydroponic nutrient tanks! With the sands stone construction; Fish Tank Air Stone can also be chemically cleaned without the risk of damaging the stone It produces fine bubbles making it efficient in the replacement of Oxygen in fish ponds, tanks or hydroponic systems Weight: 130.4g Size: 31mm(diameter) x 113mm(height); Weight: 130.4g; Package content:1 x Aquarium Air Stone