diff --git a/src/falling_sand/rules.rs b/src/falling_sand/rules.rs
index d7febc6..1c61742 100644
--- a/src/falling_sand/rules.rs
+++ b/src/falling_sand/rules.rs
@@ -40,10 +40,16 @@ pub struct FallingSandRules {
 
 impl Default for FallingSandRules {
     fn default() -> Self {
-        // Pre-computed air-sand rules
+        // Pre-computed rules
+        // I should really start building a tool for this instead of manually calculating it huh
         let rule_config = RuleConfig {
-            element_groups: vec![vec![Element::Air], vec![Element::Sand]],
+            element_groups: vec![
+                vec![Element::Air],
+                vec![Element::Sand],
+                vec![Element::Water],
+            ],
             rules: vec![
+                // Air/Sand
                 ([0, 1, 0, 0], [0, 0, 0, 1]),
                 ([0, 1, 0, 1], [0, 0, 1, 1]),
                 ([0, 1, 1, 0], [0, 0, 1, 1]),
@@ -53,6 +59,62 @@ impl Default for FallingSandRules {
                 ([1, 1, 0, 0], [0, 0, 1, 1]),
                 ([1, 1, 0, 1], [0, 1, 1, 1]),
                 ([1, 1, 1, 0], [1, 0, 1, 1]),
+                // Air/Water
+                ([0, 2, 0, 0], [0, 0, 0, 2]),
+                ([0, 2, 0, 2], [0, 0, 2, 2]),
+                ([0, 2, 2, 0], [0, 0, 2, 2]),
+                ([2, 0, 0, 0], [0, 0, 2, 0]),
+                ([2, 0, 0, 2], [0, 0, 2, 2]),
+                ([2, 0, 2, 0], [0, 0, 2, 2]),
+                ([2, 2, 0, 0], [0, 0, 2, 2]),
+                ([2, 2, 0, 2], [0, 2, 2, 2]),
+                ([2, 2, 2, 0], [2, 0, 2, 2]),
+                ([0, 2, 2, 2], [2, 0, 2, 2]),
+                ([2, 0, 2, 2], [0, 2, 2, 2]),
+                // Air/Sand/Water
+                ([0, 1, 0, 2], [0, 0, 2, 1]),
+                ([0, 1, 1, 2], [0, 2, 1, 1]),
+                ([0, 1, 2, 0], [0, 0, 2, 1]),
+                ([0, 1, 2, 1], [2, 0, 1, 1]),
+                ([0, 1, 2, 2], [0, 2, 2, 1]),
+                ([0, 2, 0, 1], [0, 0, 2, 1]),
+                ([0, 2, 1, 0], [0, 0, 1, 2]),
+                ([0, 2, 1, 1], [2, 0, 1, 1]),
+                ([0, 2, 1, 2], [2, 0, 1, 2]),
+                ([0, 2, 2, 1], [2, 0, 2, 1]),
+                ([1, 0, 0, 2], [0, 0, 1, 2]),
+                ([1, 0, 1, 2], [0, 2, 1, 1]),
+                ([1, 0, 2, 0], [0, 0, 1, 2]),
+                ([1, 0, 2, 1], [2, 0, 1, 1]),
+                ([1, 0, 2, 2], [2, 0, 1, 2]),
+                ([1, 1, 0, 2], [0, 2, 1, 1]),
+                ([1, 1, 1, 2], [1, 2, 1, 1]),
+                ([1, 1, 2, 0], [2, 0, 1, 1]),
+                ([1, 1, 2, 1], [2, 1, 1, 1]),
+                ([1, 1, 2, 2], [2, 2, 1, 1]),
+                ([1, 2, 0, 0], [0, 0, 1, 2]),
+                ([1, 2, 0, 1], [0, 2, 1, 1]),
+                ([1, 2, 0, 2], [0, 2, 1, 2]),
+                ([1, 2, 1, 0], [0, 2, 1, 1]),
+                ([1, 2, 1, 2], [2, 2, 1, 1]),
+                ([1, 2, 2, 0], [0, 2, 1, 2]),
+                ([1, 2, 2, 1], [2, 2, 1, 1]),
+                ([1, 2, 2, 2], [2, 2, 1, 2]),
+                ([2, 0, 0, 1], [0, 0, 2, 1]),
+                ([2, 0, 1, 0], [0, 0, 1, 2]),
+                ([2, 0, 1, 1], [0, 2, 1, 1]),
+                ([2, 0, 1, 2], [0, 2, 1, 2]),
+                ([2, 0, 2, 1], [0, 2, 2, 1]),
+                ([2, 1, 0, 0], [0, 0, 2, 1]),
+                ([2, 1, 0, 1], [2, 0, 1, 1]),
+                ([2, 1, 0, 2], [2, 0, 2, 1]),
+                ([2, 1, 1, 0], [2, 0, 1, 1]),
+                ([2, 1, 1, 2], [2, 2, 1, 1]),
+                ([2, 1, 2, 0], [2, 0, 2, 1]),
+                ([2, 1, 2, 1], [2, 2, 1, 1]),
+                ([2, 1, 2, 2], [2, 2, 2, 1]),
+                ([2, 2, 0, 1], [0, 2, 2, 1]),
+                ([2, 2, 1, 0], [2, 0, 1, 2]),
             ],
         };
         let rules = rule_config.compile();