diff --git a/pl_waterlilies/init.lua b/pl_waterlilies/init.lua
index fa6f368..430dcc5 100644
--- a/pl_waterlilies/init.lua
+++ b/pl_waterlilies/init.lua
@@ -1,7 +1,7 @@
 -- support for i18n
 local S = minetest.get_translator("pl_waterlilies")
 
-local fill_ratio = 0.03
+local fill_ratio = minetest.settings:get("pl_waterlilies.waterlily_rarity") or 0.03
 
 local function get_ndef(name)
 	return minetest.registered_nodes[name] or {}
diff --git a/pl_waterlilies/settingtypes.txt b/pl_waterlilies/settingtypes.txt
index 523a677..c0e1062 100644
--- a/pl_waterlilies/settingtypes.txt
+++ b/pl_waterlilies/settingtypes.txt
@@ -1,5 +1,2 @@
-#Water-lilies maximum count
-pl_waterlilies_max_count (Water-lilies maximum count) int 320 1 1000
-
-#Water-lilies rarity
-pl_waterlilies_rarity (Water-lilies rarity) int 33 0 100
+# Waterlily rarity (higher number -> higher probability)
+pl_waterlilies.waterlily_rarity (Waterlily rarity) float 0.03 0.0001 1