Ripples are overlay/temp

code/modules/shuttle/ripple.dm

@@ -1,4 +1,4 @@
-/obj/effect/ripple
+/obj/effect/overlay/temp/ripple
 	name = "hyperspace ripple"
 	desc = "Something is coming through hyperspace, you can see the \
 		visual disturbances. It's probably best not to be on top of these \
@@ -10,11 +10,8 @@
 	layer = RIPPLE_LAYER
 	alpha = 0
 
-/obj/effect/ripple/New()
+	duration = 3 * SHUTTLE_RIPPLE_TIME
+
+/obj/effect/overlay/temp/ripple/New()
 	. = ..()
 	animate(src, alpha=255, time=SHUTTLE_RIPPLE_TIME)
-	// In case something goes wrong, delete us in a bit
-	addtimer(src, "delself", 3 * SHUTTLE_RIPPLE_TIME, FALSE)
-
-/obj/effect/ripple/proc/delself()
-	qdel(src)

code/modules/shuttle/shuttle.dm

@@ -373,8 +373,8 @@
 
 /obj/docking_port/mobile/proc/create_ripples(obj/docking_port/stationary/S1)
 	var/list/turfs = ripple_area(S1)
-	for(var/i in turfs)
-		ripples += new /obj/effect/ripple(i)
+	for(var/t in turfs)
+		ripples += PoolOrNew(/obj/effect/overlay/temp/ripple, t)
 
 /obj/docking_port/mobile/proc/ripple_area(obj/docking_port/stationary/S1)
 	var/list/L0 = return_ordered_turfs(x, y, z, dir, areaInstance)