diff --git a/code/ZAS/Controller.dm b/code/ZAS/Controller.dm
index a2d9bcd972..b53afffe5c 100644
--- a/code/ZAS/Controller.dm
+++ b/code/ZAS/Controller.dm
@@ -154,18 +154,18 @@ Total Unsimulated Turfs: [world.maxx*world.maxy*world.maxz - simulated_turf_coun
 		#ifdef ZASDBG
 		var/updated = 0
 		#endif
-		
+
 		//defer updating of self-zone-blocked turfs until after all other turfs have been updated.
 		//this hopefully ensures that non-self-zone-blocked turfs adjacent to self-zone-blocked ones
 		//have valid zones when the self-zone-blocked turfs update.
 		var/list/deferred = list()
-		
+
 		for(var/turf/T in updating)
 			//check if the turf is self-zone-blocked
 			if(T.c_airblock(T) & ZONE_BLOCKED)
 				deferred += T
 				continue
-			
+
 			T.update_air_properties()
 			T.post_update_air_properties()
 			T.needs_air_update = 0
@@ -234,6 +234,7 @@ Total Unsimulated Turfs: [world.maxx*world.maxy*world.maxz - simulated_turf_coun
 
 /datum/controller/air_system/proc/remove_zone(zone/z)
 	zones.Remove(z)
+	zones_to_update.Remove(z)
 
 /datum/controller/air_system/proc/air_blocked(turf/A, turf/B)
 	#ifdef ZASDBG
diff --git a/code/ZAS/Zone.dm b/code/ZAS/Zone.dm
index 9fcddc9246..da39b868d3 100644
--- a/code/ZAS/Zone.dm
+++ b/code/ZAS/Zone.dm
@@ -108,11 +108,12 @@ Class Procs:
 	c_invalidate()
 	for(var/turf/simulated/T in contents)
 		into.add(T)
+		T.update_graphic(graphic_remove = air.graphic)
 		#ifdef ZASDBG
 		T.dbg(merged)
 		#endif
-	
-	//rebuild the old zone's edges so that the will be possesed by the new zone
+
+	//rebuild the old zone's edges so that they will be possessed by the new zone
 	for(var/connection_edge/E in edges)
 		if(E.contains_zone(into))
 			continue //don't need to rebuild this edge