1, Hollow Suspension
Both sides of the top layer have hollow cylindrical suspension, but its not easy to sink down.
2. Fish egg filter.
Double triangular funnel filter plate design, easy to put the fried fish into the bottom layer.
3. Non-slip suction cups.
Good adhesion effect and difficult to fall off.
4. Inlet gaps
Bottom and both sides have slanted holes.Ensures water flow permeability, replace water and increase oxygen in one step.(Note: The gap is only 0.04 inch (1 mm), so the fishes do not swim.)