Update Readme

README.md

@@ -11,7 +11,6 @@ This mod is in early alpha.
 - Interaction of different liquid types, e.g. lava and water
 - Ability to scoop up liquids with a level below 8
 - Interaction with pistons or pipes
-- Swimming in liquids less than 8 levels high
 - Perfect performance
 - Integration with any other mods
 - A smooth liquid surface
@@ -23,13 +22,20 @@ This mod is in early alpha.
 - Settling water
 - Multi-level liquids from 1 to 8
 - Draining all oceans in a jiffy
+- Water duplication due to a [bug](https://github.com/minetest/minetest/issues/15647) in the Luanti Engine
 
 ## API
 
 - Other developers may chose to support this mod by using the API.
-```
---Example for the default water
+```lua
+--Example: Register default:water_source
 liquid_physics.register_liquid("default", "water_source", "water_flowing")
-```
 
-**Note:** the API is not complete and may function may not be available, such as regulating the liquid level
+--Example: Check if block underneath is liquid and then proceed to reduce its level
+local id_water = liquid_physics.get_liquid_id("default:water_source")
+local liquid = liquid_physics.get_liquid_at(pos)
+
+if liquid and liquid.liquid_id == id_water then
+    liquid_physics.set_liquid_at(pos, id_water, liquid.liquid_level - 1)
+end
+```