diff --git a/code/datums/progressbar.dm b/code/datums/progressbar.dm
index 5656d8c8598..f15f37f67bb 100644
--- a/code/datums/progressbar.dm
+++ b/code/datums/progressbar.dm
@@ -21,7 +21,7 @@
 	///Where to draw the progress bar above the icon
 	var/offset_y
 
-/datum/progressbar/New(mob/User, goal_number, atom/target)
+/datum/progressbar/New(mob/User, goal_number, atom/target, starting_amount)
 	. = ..()
 	if (!istype(target))
 		stack_trace("Invalid target [target] passed in")
@@ -60,6 +60,8 @@
 	RegisterSignal(user, COMSIG_MOB_LOGOUT, PROC_REF(clean_user_client))
 	RegisterSignal(user, COMSIG_MOB_LOGIN, PROC_REF(on_user_login))
 
+	if(starting_amount)
+		update(starting_amount)
 
 /datum/progressbar/Destroy()
 	if(user)
diff --git a/code/game/objects/items/tanks/tanks.dm b/code/game/objects/items/tanks/tanks.dm
index 5a92271c184..0ea4344a7c8 100644
--- a/code/game/objects/items/tanks/tanks.dm
+++ b/code/game/objects/items/tanks/tanks.dm
@@ -57,6 +57,8 @@
 	var/list/reaction_info
 	/// Mob that is currently breathing from the tank.
 	var/mob/living/carbon/breathing_mob = null
+	///Progress bar showing how much volume is in the tank when equipped.
+	var/datum/progressbar/volume_bar
 	/// Attached assembly, can either detonate the tank or release its contents when receiving a signal
 	var/obj/item/assembly_holder/tank_assembly
 	/// Whether or not it will try to explode when it receives a signal
@@ -89,19 +91,14 @@
 /obj/item/tank/proc/after_internals_opened(mob/living/carbon/carbon_target)
 	breathing_mob = carbon_target
 	playsound(loc, 'sound/items/internals/internals_on.ogg', 15, TRUE, SHORT_RANGE_SOUND_EXTRARANGE)
-	RegisterSignal(carbon_target, COMSIG_MOB_GET_STATUS_TAB_ITEMS, PROC_REF(get_status_tab_item))
+	var/pressure_on_open = air_contents.return_pressure() //we start off "full" when we toggle, and count down from there.
+	volume_bar = new(carbon_target, pressure_on_open, src, pressure_on_open)
 
 /// Called by carbons after they disconnect the tank from their breathing apparatus.
 /obj/item/tank/proc/after_internals_closed(mob/living/carbon/carbon_target)
 	breathing_mob = null
 	playsound(loc, 'sound/items/internals/internals_off.ogg', 15, TRUE, SHORT_RANGE_SOUND_EXTRARANGE)
-	UnregisterSignal(carbon_target, COMSIG_MOB_GET_STATUS_TAB_ITEMS)
-
-/obj/item/tank/proc/get_status_tab_item(mob/living/source, list/items)
-	SIGNAL_HANDLER
-	items += "Internal Atmosphere Info: [name]"
-	items += "Tank Pressure: [air_contents.return_pressure()] kPa"
-	items += "Distribution Pressure: [distribute_pressure] kPa"
+	QDEL_NULL(volume_bar)
 
 /// Attempts to toggle the mob's internals on or off using this tank. Returns TRUE if successful.
 /obj/item/tank/proc/toggle_internals(mob/living/carbon/mob_target)
@@ -139,6 +136,7 @@
 	STOP_PROCESSING(SSobj, src)
 	air_contents = null
 	QDEL_NULL(tank_assembly)
+	QDEL_NULL(volume_bar)
 	return ..()
 
 /obj/item/tank/update_overlays()
@@ -324,6 +322,8 @@
 /obj/item/tank/process(seconds_per_tick)
 	if(!air_contents)
 		return
+	if(!QDELETED(volume_bar))
+		volume_bar.update(air_contents.return_pressure())
 
 	//Allow for reactions
 	excited = (excited | air_contents.react(src))