While one tank is in settle/decant mode the other is aerating and filling.
The female then brooded the eggs, caring for them by aerating them and keeping them clean.
The act of aerating the soil also increases the rate of decomposition and reduces soil organic matter.
Molehills have an important benefit to soil by aerating and tilling it, adding to its fertility.
They are characterized by vertically erect aerating branches (pneumatophores) extending up to 20 cm above the soil.
This tool helped to bring the low-lying soil to the upper layer and send the top layer to the bottom, thereby aerating the land.
Next it passed on to a number of precipitating tanks, each holding 50000 impgal, where after 30 minutes of settling, it passed over aerating weirs.
It can be also used as an aerating medium for potted plants.
