diff --git a/core/assets/maps/groundZero.msav b/core/assets/maps/groundZero.msav
index 73e52f5b18..75232a33f3 100644
Binary files a/core/assets/maps/groundZero.msav and b/core/assets/maps/groundZero.msav differ
diff --git a/core/src/io/anuke/mindustry/world/Block.java b/core/src/io/anuke/mindustry/world/Block.java
index b8a50b8243..1963f72871 100644
--- a/core/src/io/anuke/mindustry/world/Block.java
+++ b/core/src/io/anuke/mindustry/world/Block.java
@@ -584,6 +584,7 @@ public class Block extends BlockStorage{
     public void displayConsumption(Tile tile, Table table){
         table.left();
         for(Consume cons : consumes.all()){
+            if(cons.isOptional()) continue;
             cons.build(tile, table);
         }
     }
diff --git a/core/src/io/anuke/mindustry/world/blocks/defense/turrets/ItemTurret.java b/core/src/io/anuke/mindustry/world/blocks/defense/turrets/ItemTurret.java
index 86ea2257a7..6ffc23dc59 100644
--- a/core/src/io/anuke/mindustry/world/blocks/defense/turrets/ItemTurret.java
+++ b/core/src/io/anuke/mindustry/world/blocks/defense/turrets/ItemTurret.java
@@ -1,18 +1,18 @@
 package io.anuke.mindustry.world.blocks.defense.turrets;
 
-import io.anuke.arc.collection.ObjectMap;
-import io.anuke.arc.collection.OrderedMap;
-import io.anuke.arc.scene.ui.layout.Table;
-import io.anuke.mindustry.Vars;
-import io.anuke.mindustry.entities.bullet.BulletType;
-import io.anuke.mindustry.entities.type.TileEntity;
+import io.anuke.arc.collection.*;
+import io.anuke.arc.scene.ui.layout.*;
+import io.anuke.mindustry.*;
+import io.anuke.mindustry.entities.bullet.*;
 import io.anuke.mindustry.entities.type.Unit;
-import io.anuke.mindustry.graphics.Pal;
-import io.anuke.mindustry.type.Item;
-import io.anuke.mindustry.ui.Bar;
-import io.anuke.mindustry.world.Tile;
-import io.anuke.mindustry.world.meta.BlockStat;
-import io.anuke.mindustry.world.meta.values.AmmoListValue;
+import io.anuke.mindustry.entities.type.*;
+import io.anuke.mindustry.graphics.*;
+import io.anuke.mindustry.type.*;
+import io.anuke.mindustry.ui.*;
+import io.anuke.mindustry.world.*;
+import io.anuke.mindustry.world.consumers.*;
+import io.anuke.mindustry.world.meta.*;
+import io.anuke.mindustry.world.meta.values.*;
 
 import java.io.*;
 
@@ -36,6 +36,18 @@ public class ItemTurret extends CooledTurret{
 
         stats.remove(BlockStat.itemCapacity);
         stats.add(BlockStat.ammo, new AmmoListValue<>(ammo));
+        consumes.add(new ConsumeItemFilter(i -> ammo.containsKey(i)){
+            @Override
+            public boolean valid(TileEntity entity){
+                //valid when there's any ammo in the turret
+                return !((ItemTurretEntity)entity).ammo.isEmpty();
+            }
+
+            @Override
+            public void display(BlockStats stats){
+                //don't display
+            }
+        });
     }
 
     @Override
diff --git a/core/src/io/anuke/mindustry/world/blocks/defense/turrets/LiquidTurret.java b/core/src/io/anuke/mindustry/world/blocks/defense/turrets/LiquidTurret.java
index 48e3f52c77..6973edfd2d 100644
--- a/core/src/io/anuke/mindustry/world/blocks/defense/turrets/LiquidTurret.java
+++ b/core/src/io/anuke/mindustry/world/blocks/defense/turrets/LiquidTurret.java
@@ -1,18 +1,18 @@
 package io.anuke.mindustry.world.blocks.defense.turrets;
 
-import io.anuke.arc.collection.ObjectMap;
-import io.anuke.arc.collection.OrderedMap;
-import io.anuke.mindustry.entities.Effects;
-import io.anuke.mindustry.entities.bullet.BulletType;
-import io.anuke.mindustry.entities.effect.Fire;
-import io.anuke.mindustry.type.Item;
-import io.anuke.mindustry.type.Liquid;
-import io.anuke.mindustry.world.Tile;
-import io.anuke.mindustry.world.meta.BlockStat;
-import io.anuke.mindustry.world.meta.values.AmmoListValue;
+import io.anuke.arc.collection.*;
+import io.anuke.mindustry.entities.*;
+import io.anuke.mindustry.entities.bullet.*;
+import io.anuke.mindustry.entities.effect.*;
+import io.anuke.mindustry.entities.type.*;
+import io.anuke.mindustry.type.*;
+import io.anuke.mindustry.world.*;
+import io.anuke.mindustry.world.blocks.defense.turrets.ItemTurret.*;
+import io.anuke.mindustry.world.consumers.*;
+import io.anuke.mindustry.world.meta.*;
+import io.anuke.mindustry.world.meta.values.*;
 
-import static io.anuke.mindustry.Vars.tilesize;
-import static io.anuke.mindustry.Vars.world;
+import static io.anuke.mindustry.Vars.*;
 
 public abstract class LiquidTurret extends Turret{
     protected ObjectMap<Liquid, BulletType> ammo = new ObjectMap<>();
@@ -32,6 +32,17 @@ public abstract class LiquidTurret extends Turret{
         super.setStats();
 
         stats.add(BlockStat.ammo, new AmmoListValue<>(ammo));
+        consumes.add(new ConsumeLiquidFilter(i -> ammo.containsKey(i), 1f){
+            @Override
+            public boolean valid(TileEntity entity){
+                return !((TurretEntity)entity).ammo.isEmpty();
+            }
+
+            @Override
+            public void display(BlockStats stats){
+
+            }
+        });
     }
 
     @Override
diff --git a/core/src/io/anuke/mindustry/world/consumers/ConsumeItemFilter.java b/core/src/io/anuke/mindustry/world/consumers/ConsumeItemFilter.java
index fe9e0a17d4..81503037f0 100644
--- a/core/src/io/anuke/mindustry/world/consumers/ConsumeItemFilter.java
+++ b/core/src/io/anuke/mindustry/world/consumers/ConsumeItemFilter.java
@@ -11,7 +11,7 @@ import io.anuke.mindustry.world.meta.BlockStat;
 import io.anuke.mindustry.world.meta.BlockStats;
 import io.anuke.mindustry.world.meta.values.ItemFilterValue;
 
-import static io.anuke.mindustry.Vars.content;
+import static io.anuke.mindustry.Vars.*;
 
 public class ConsumeItemFilter extends Consume{
     public final Predicate<Item> filter;
@@ -33,7 +33,7 @@ public class ConsumeItemFilter extends Consume{
     @Override
     public void build(Tile tile, Table table){
         MultiReqImage image = new MultiReqImage();
-        content.items().each(filter, item -> image.add(new ReqImage(new ItemImage(item.icon(Icon.large), 1), () -> tile.entity != null && tile.entity.items != null && tile.entity.items.has(item))));
+        content.items().each(i -> filter.test(i) && (!world.isZone() || data.isUnlocked(i)), item -> image.add(new ReqImage(new ItemImage(item.icon(Icon.large), 1), () -> tile.entity != null && tile.entity.items != null && tile.entity.items.has(item))));
 
         table.add(image).size(8 * 4);
     }