Description
These are stainless steel effervescent stones, which are life-long, wear-resistant, and they do not give off anything in the water or other liquids. Also, the plastic of the tubes in the water is food grade, and the blue caps are very sturdy and durable. The tubing in the blue caps is attached with a compression fitting, if you want to loosen it you push down the gray ring and pull the tubing out of the cap. Just as easily push the hose back into the cap. The white tube is attached using the same system, but a lot sturdier. To this you can connect the nose goggles.
