diff --git a/SeaBlock/changelog.txt b/SeaBlock/changelog.txt
index 2dc1cf0..cc8872a 100644
--- a/SeaBlock/changelog.txt
+++ b/SeaBlock/changelog.txt
@@ -19,6 +19,7 @@ Date: ??.??.??
     - Remove underused items/fluids #334
       - Hid crushed stone. Use stone instead. Ratios will all stay the same
       - Hid liquid fuel. Enriched fuel is now made directly from fuel oil plus residual gas
+    - Changed recipe icon for Slag 1 and Slag 2 #335
   Bugfixes:
     - Fixed tech steam-power missing a locale in some mod configurations #332
 ---------------------------------------------------------------------------------------------------
diff --git a/SeaBlock/data-updates/slag-processing.lua b/SeaBlock/data-updates/slag-processing.lua
index bdeaada..353d54a 100644
--- a/SeaBlock/data-updates/slag-processing.lua
+++ b/SeaBlock/data-updates/slag-processing.lua
@@ -120,3 +120,9 @@ for _, v in pairs({
 }) do
   seablock.lib.substresult(v, "slag", nil, 2)
 end
+
+-- Change the recipe icon for Dirt water electrolysis to show slag icon
+data.raw.recipe["dirt-water-separation"].icons = angelsmods.functions.add_number_icon_layer(
+  angelsmods.functions.get_object_icons("slag"), 1, angelsmods.petrochem.number_tint)
+data.raw.recipe["dirt-water-separation-2"].icons = angelsmods.functions.add_number_icon_layer(
+  angelsmods.functions.get_object_icons("slag"), 2, angelsmods.petrochem.number_tint)