This is a simple filter that has a tube reaching into the small pond. When the water rises up the bucket it reaches the top of the tube. The water forms into a vortex and you can see the whirlpool action as and hear sucking noises as it results in a glory hole. The air is mixed with the water going down the tube. When it exits the tube you can see that it bubbles and creates major aeration for the fish living in the small in-ground pond.
Excellent. Been looking for a simple filter design for my fish tank. This will do the trick.
saeidmomtahan 3 months ago