diff --git a/code/modules/reagents/chemistry/holder.dm b/code/modules/reagents/chemistry/holder.dm
index 06d6d02eb2e..992e0933588 100644
--- a/code/modules/reagents/chemistry/holder.dm
+++ b/code/modules/reagents/chemistry/holder.dm
@@ -16,8 +16,6 @@
 /datum/reagents/New(maximum=100)
 	maximum_volume = maximum
 
-	if(!(flags & REAGENT_NOREACT))
-		START_PROCESSING(SSobj, src)
 
 	//I dislike having these here but map-objects are initialised before world/New() is called. >_>
 	if(!GLOB.chemical_reagents_list)
@@ -54,7 +52,6 @@
 
 /datum/reagents/Destroy()
 	. = ..()
-	STOP_PROCESSING(SSobj, src)
 	var/list/cached_reagents = reagent_list
 	for(var/reagent in cached_reagents)
 		var/datum/reagent/R = reagent
@@ -288,24 +285,11 @@
 		C.update_stamina()
 	update_total()
 
-/datum/reagents/process()
-	var/list/cached_reagents = reagent_list
-	if(flags & REAGENT_NOREACT)
-		STOP_PROCESSING(SSobj, src)
-		return
-
-	for(var/reagent in cached_reagents)
-		var/datum/reagent/R = reagent
-		R.on_tick()
 
 /datum/reagents/proc/set_reacting(react = TRUE)
 	if(react)
-		// Order is important, process() can remove from processing if
-		// the flag is present
 		flags &= ~(REAGENT_NOREACT)
-		START_PROCESSING(SSobj, src)
 	else
-		STOP_PROCESSING(SSobj, src)
 		flags |= REAGENT_NOREACT
 
 /datum/reagents/proc/conditional_update_move(atom/A, Running = 0)
diff --git a/code/modules/reagents/chemistry/reagents.dm b/code/modules/reagents/chemistry/reagents.dm
index 342e2154f8b..5f76a87654b 100644
--- a/code/modules/reagents/chemistry/reagents.dm
+++ b/code/modules/reagents/chemistry/reagents.dm
@@ -80,10 +80,6 @@
 /datum/reagent/proc/on_update(atom/A)
 	return
 
-// Called every time reagent containers process.
-/datum/reagent/proc/on_tick(data)
-	return
-
 // Called when the reagent container is hit by an explosion
 /datum/reagent/proc/on_ex_act(severity)
 	return
diff --git a/code/modules/reagents/chemistry/reagents/pyrotechnic_reagents.dm b/code/modules/reagents/chemistry/reagents/pyrotechnic_reagents.dm
index 36320459e8c..4c1965058cd 100644
--- a/code/modules/reagents/chemistry/reagents/pyrotechnic_reagents.dm
+++ b/code/modules/reagents/chemistry/reagents/pyrotechnic_reagents.dm
@@ -196,13 +196,6 @@
 		M.bodytemperature -= 15
 	..()
 
-/datum/reagent/cryostylane/on_tick()
-	if(holder.has_reagent("oxygen"))
-		holder.remove_reagent("oxygen", 1)
-		holder.chem_temp -= 10
-		holder.handle_reactions()
-	..()
-
 /datum/reagent/cryostylane/reaction_turf(turf/T, reac_volume)
 	if(reac_volume >= 5)
 		for(var/mob/living/simple_animal/slime/M in T)
@@ -222,13 +215,6 @@
 		M.bodytemperature += 15
 	..()
 
-/datum/reagent/pyrosium/on_tick()
-	if(holder.has_reagent("oxygen"))
-		holder.remove_reagent("oxygen", 1)
-		holder.chem_temp += 10
-		holder.handle_reactions()
-	..()
-
 /datum/reagent/teslium //Teslium. Causes periodic shocks, and makes shocks against the target much more effective.
 	name = "Teslium"
 	id = "teslium"
diff --git a/code/modules/reagents/chemistry/recipes/pyrotechnics.dm b/code/modules/reagents/chemistry/recipes/pyrotechnics.dm
index 8ca65a65880..aa97dd31800 100644
--- a/code/modules/reagents/chemistry/recipes/pyrotechnics.dm
+++ b/code/modules/reagents/chemistry/recipes/pyrotechnics.dm
@@ -342,6 +342,23 @@
 	holder.chem_temp = 20 // cools the fuck down
 	return
 
+/datum/chemical_reaction/cryostylane_oxygen
+	name = "ephemeral cryostylane reaction"
+	id = "cryostylane_oxygen"
+	results = list("cryostylane" = 1)
+	required_reagents = list("cryostylane" = 1, "oxygen" = 1)
+
+/datum/chemical_reaction/cryostylane_oxygen/on_reaction(datum/reagents/holder, created_volume)
+	holder.chem_temp -= 10*created_volume
+
+/datum/chemical_reaction/pyrosium_oxygen
+	name = "ephemeral pyrosium reaction"
+	id = "pyrosium_oxygen"
+	results = list("pyrosium" = 1)
+	required_reagents = list("pyrosium" = 1, "oxygen" = 1)
+
+/datum/chemical_reaction/pyrosium_oxygen/on_reaction(datum/reagents/holder, created_volume)
+	holder.chem_temp += 10*created_volume
 
 /datum/chemical_reaction/pyrosium
 	name = "pyrosium"