anchor.diff:  /datum/subsystem/air/proc/setup_pipenets(z_level)
   	for (var/obj/machinery/atmospherics/AM in atmos_machinery)
   		if (z_level && AM.z != z_level)
  +			CHECK_TICK
   			continue
   		AM.build_network()
   		CHECK_TICK
  
positive.code: /datum/subsystem/air/proc/setup_atmos_machinery(z_level)
  	for (var/obj/machinery/atmospherics/AM in atmos_machinery)
  		if (z_level && AM.z != z_level)
  			continue
  		AM.atmosinit()
  		CHECK_TICK
  
negative.code: 		active_turfs -= t
  
  		if(t.blocks_air)
  			CHECK_TICK
  			continue
  
  		var/turf/open/T = t
  		if(!istype(T))
  			CHECK_TICK
  			continue
  		T.excited = 0
  		T.update_visuals()
  