compile

code/modules/pool/pool_controller.dm

@@ -78,11 +78,11 @@
 		W.controller = src
 	for(var/obj/machinery/pool/drain/pooldrain in cached)
 		linked_drain = pooldrain
-		linked_drain.pool_controller = src
+		linked_drain.controller = src
 		break
 	for(var/obj/machinery/pool/filter/F in cached)
 		linked_filter = F
-		linked_filter.pool_controller = src
+		linked_filter.controller = src
 		break
 
 /obj/machinery/pool/controller/emag_act(mob/user)

code/modules/pool/pool_drain.dm

@@ -54,7 +54,7 @@
 			else
 				for(var/turf/open/pool/P in controller.linked_turfs)
 					P.filled = TRUE
-					P.update_ion()
+					P.update_icon()
 				for(var/obj/effect/waterspout/S in range(1, src))
 					qdel(S)
 				controller.drained = FALSE
@@ -91,8 +91,8 @@
 					P.update_icon()
 				for(var/obj/effect/whirlpool/W in range(1, src))
 					qdel(W)
-				linked_controller.drained = TRUE
-				linked_controller.mist_off()
+				controller.drained = TRUE
+				controller.mist_off()
 				active = FALSE
 				filling = TRUE