| 摘要 |
<p>Purifier for salt water in aquarium comprises an outer pipe in which is disposed concentrically and spaced from the outer pipe an inner pipe which is closed at its top end and which includes air supply means and a radial outlet opening for the water-air mixt. The outer pipe is provided at the top with an opening for exit of foam. Pref. the outlet opening of the inner pipe is at a lower level than the upper edge of the inner pipe to form a pressure chamber, and above the outlet opening for the water-air mixt. is a foam collecting chamber. The upper edge of the inner pipe may be at a lower level than that of the outer pipe, and the annular chamber between the two pipes may be divided up radially by radial webs, with an outlet opening in each partial annular chamber.</p> |
