diff --git a/code/modules/reagents/chemistry/holder.dm b/code/modules/reagents/chemistry/holder.dm
index 27b8b440f4..85f1f0ad69 100644
--- a/code/modules/reagents/chemistry/holder.dm
+++ b/code/modules/reagents/chemistry/holder.dm
@@ -1,4 +1,4 @@
-
+im
 /proc/build_chemical_reagent_list()
 	//Chemical Reagents - Initialises all /datum/reagent into a list indexed by reagent id
 
@@ -484,6 +484,7 @@
 						return 0
 					else
 						//reactedVol = FermiReact(selected_reaction, chem_temp, pH, multiplier, reactedVol, targetVol, cached_required_reagents, cached_results)
+						selected_reaction.on_reaction(src, multiplier)
 						START_PROCESSING(SSprocessing, src)
 						message_admins("FermiChem processing started")
 						fermiIsReacting = TRUE
@@ -558,8 +559,8 @@
 		targetVol = 0
 		handle_reactions()
 		update_total()
-
-		C.on_reaction(src, multiplier, special_react_result)
+		C.fermiFinish(src, multiplier)
+		//C.on_reaction(src, multiplier, special_react_result)
 		return
 	for(var/P in cached_results)
 		targetVol = cached_results[P]*multiplier
@@ -581,7 +582,8 @@
 			targetVol = 0
 			handle_reactions()
 			update_total()
-			C.on_reaction(src, multiplier, special_react_result)
+			C.fermiFinish(src, multiplier)
+			//C.on_reaction(src, multiplier, special_react_result)
 			return
 	else
 		STOP_PROCESSING(SSprocessing, src)
@@ -591,7 +593,8 @@
 		targetVol = 0
 		handle_reactions()
 		update_total()
-		C.on_reaction(src, multiplier, special_react_result)
+		C.fermiFinish(src, multiplier)
+		//C.on_reaction(src, multiplier, special_react_result)
 		return
 
 	//handle_reactions()
@@ -613,13 +616,16 @@
 	if (chem_temp > C.ExplodeTemp)
 		//go to explode proc
 		message_admins("temperature is over limit: [C.ExplodeTemp] Current temperature: [chem_temp]")
-		FermiExplode()
+		C.FermiExplode(src, (reactedVol+targetVol), chem_temp, pH)
 
-	if (pH > 14 || pH < 0)
+	if (pH > 14)
+	 	pH = 14
+	else (pH < 0 || )
+		pH = 0
 		//Create chemical sludge eventually(for now just destroy the beaker I guess?)
 		//TODO Strong acids eat glass, make it so you NEED plastic beakers for superacids(for some reactions)
 		message_admins("pH is lover limit, cur pH: [pH]")
-		FermiExplode()
+
 
 	//For now, purity is handled elsewhere
 
@@ -630,14 +636,14 @@
 			deltapH = 0
 			return//If outside pH range, no reaction
 		else
-			deltapH = (((pH - (C.OptimalpHMin - C.ReactpHLim))**C.CurveSharppH)/(C.ReactpHLim**C.CurveSharppH))
+			deltapH = (((pH - (C.OptimalpHMin - C.ReactpHLim))**C.CurveSharppH)/((C.ReactpHLim**C.CurveSharppH))
 	//Upper range
 	else if (pH > C.OptimalpHMin)
 		if (pH > (C.OptimalpHMin + C.ReactpHLim))
 			deltapH = 0
 			return //If outside pH range, no reaction
 		else
-			deltapH = ((C.ReactpHLim -(pH - (C.OptimalpHMax + C.ReactpHLim))+C.ReactpHLim)/(C.ReactpHLim**C.CurveSharppH))
+			deltapH = (((pH - (C.OptimalpHMax + C.ReactpHLim))**C.CurveSharppH)/(C.ReactpHLim**C.CurveSharppH))
 	//Within mid range
 	else if (pH >= C.OptimalpHMin && pH <= C.OptimalpHMax)
 		deltapH = 1
@@ -650,7 +656,7 @@
 
 	//Calculate DeltaT (Deviation of T from optimal)
 	if (chem_temp < C.OptimalTempMax && chem_temp >= C.OptimalTempMin)
-		deltaT = (((C.OptimalTempMin - chem_temp)**C.CurveSharpT)/((C.OptimalTempMax - C.OptimalTempMin)**C.CurveSharpT))
+		deltaT = (((chem_temp - C.OptimalTempMin)**C.CurveSharpT)/((C.OptimalTempMax - C.OptimalTempMin)**C.CurveSharpT))
 	else if (chem_temp >= C.OptimalTempMax)
 		deltaT = 1
 	else
@@ -692,6 +698,7 @@
 		SSblackbox.record_feedback("tally", "chemical_reaction", cached_results[P]*stepChemAmmount, P)//log
 		add_reagent(P, cached_results[P]*stepChemAmmount, null, chem_temp, purity)//add reagent function!! I THINK I can do this:
 
+	C.FermiCreate(src)
 	message_admins("purity: [purity], purity of beaker")
 	message_admins("Temp before change: [chem_temp], pH after change: [pH]")
 	//Apply pH changes and thermal output of reaction to beaker
@@ -809,6 +816,14 @@
 		WARNING("[my_atom] attempted to add a reagent called '[reagent]' which doesn't exist. ([usr])")
 		return FALSE
 
+	if (D.id == "water") //Do like an otter, add acid to water.
+		(if pH <= 2)
+			var/datum/effect_system/smoke_spread/chem/smoke_machine/s = new
+			s.set_up(reagents, totalVol, pH*10, src)
+			s.start()
+			remove_any(amount/10)
+
+
 	if(!pH)
 		other_pH = D.pH
 
@@ -872,6 +887,7 @@
 	if(istype(D, /datum/reagent/fermi))//Is this a fermichem?
 		var/datum/reagent/fermi/FermiTime = D //It's Fermi time!
 		FermiTime.fermiCreate(R.holder) //Seriously what is "data" ????
+
 		//This is how I keep myself sane.
 
 
diff --git a/code/modules/reagents/chemistry/reagents.dm b/code/modules/reagents/chemistry/reagents.dm
index 87d823cf52..289896ddac 100644
--- a/code/modules/reagents/chemistry/reagents.dm
+++ b/code/modules/reagents/chemistry/reagents.dm
@@ -131,7 +131,8 @@
 		rs += "[R.name], [R.volume]"
 
 	return rs.Join(" | ")
-
+/* MOVED TO CHEMICAL REACTION
 //Handler for explosion reaction
 /datum/reagents/proc/FermiExplode(turf/T, obj/O, mob/living/M, volume)
 	return
+*/
diff --git a/code/modules/reagents/chemistry/reagents/other_reagents.dm b/code/modules/reagents/chemistry/reagents/other_reagents.dm
index 558f2ebdf4..1c8fefcfae 100644
--- a/code/modules/reagents/chemistry/reagents/other_reagents.dm
+++ b/code/modules/reagents/chemistry/reagents/other_reagents.dm
@@ -1108,6 +1108,7 @@
 	color = "#C8A5DC" // rgb: 200, 165, 220
 	metabolization_rate = 1.5 * REAGENTS_METABOLISM
 	taste_description = "sourness"
+	pH = 11.9
 
 /datum/reagent/cryptobiolin/on_mob_life(mob/living/carbon/M)
 	M.Dizzy(1)
@@ -1514,8 +1515,8 @@
 	description = "An aromatic ring of carbon with a hydroxyl group. A useful precursor to some medicines, but has no healing properties on its own."
 	reagent_state = LIQUID
 	color = "#C8A5DC"
-	taste_description = "acid"
-	pH = 5
+	taste_description = "sweet and tarry" //Again, not a strong acid.
+	pH = 5.5
 
 /datum/reagent/ash
 	name = "Ash"
@@ -1532,7 +1533,7 @@
 	description = "A slick, slightly carcinogenic liquid. Has a multitude of mundane uses in everyday life."
 	reagent_state = LIQUID
 	color = "#C8A5DC"
-	taste_description = "acid"
+	taste_description = "solvent"//It's neutral though..?
 
 /datum/reagent/colorful_reagent
 	name = "Colorful Reagent"
@@ -1630,7 +1631,8 @@
 	description = "Also known as sodium hydroxide. As a profession making this is somewhat underwhelming."
 	reagent_state = LIQUID
 	color = "#FFFFD6" // very very light yellow
-	taste_description = "acid"
+	taste_description = "alkali" //who put ACID for NaOH ????
+	pH = 13
 
 /datum/reagent/drying_agent
 	name = "Drying agent"
diff --git a/code/modules/surgery/organs/lungs.dm b/code/modules/surgery/organs/lungs.dm
index 412b97d503..b952c19d66 100644
--- a/code/modules/surgery/organs/lungs.dm
+++ b/code/modules/surgery/organs/lungs.dm
@@ -54,6 +54,36 @@
 
 	var/crit_stabilizing_reagent = "epinephrine"
 
+	//health
+	var/health = 500
+	var/damage = 0
+
+//TODO: lung health affects lung function
+/obj/item/organ/tongue/proc/adjustLungLoss(mob/living/carbon/M, damage_mod)
+	if (maxHealth == "plasma")
+		return
+	if(damage+damage_mod < 0)
+		damage = 0
+		return
+
+	damage += damage_mod
+	if ((damage / maxHealth) > 1)
+		to_chat(M, "<span class='userdanger'>You feel your lungs collapse within your chest as you gasp for air, unable to inflate them anymore!</span>")
+		M.emote("cough")
+		qdel(src)
+	else if ((damage / maxHealth) > 0.75)
+		to_chat(M, "<span class='warning'>It's getting really hard to breathe!!</span>")
+		M.emote("gasp")
+		H.Dizzy(3)
+	else if ((damage / maxHealth) > 0.5)
+		H.Dizzy(2)
+		to_chat(M, "<span class='notice'>Your chest is really starting to hurt.</span>")
+		M.emote("cough")
+		H.Dizzy(1)
+	else if ((damage / maxHealth) > 0.2)
+		to_chat(M, "<span class='notice'>You feel an ache within your chest.</span>")
+		M.emote("cough")
+
 
 /obj/item/organ/lungs/proc/check_breath(datum/gas_mixture/breath, mob/living/carbon/human/H)
 	if((H.status_flags & GODMODE))
@@ -126,7 +156,7 @@
 		else
 			H.failed_last_breath = FALSE
 			if(H.health >= H.crit_threshold)
-				H.adjustOxyLoss(-5)
+				H.adjustOxyLoss(-5*((damage/health)/2)) //More damaged lungs = slower oxy rate up to a factor of half
 			gas_breathed = breath_gases[/datum/gas/oxygen][MOLES]
 			H.clear_alert("not_enough_oxy")
 
@@ -155,7 +185,7 @@
 		else
 			H.failed_last_breath = FALSE
 			if(H.health >= H.crit_threshold)
-				H.adjustOxyLoss(-5)
+				H.adjustOxyLoss(-5*((damage/health)/2))
 			gas_breathed = breath_gases[/datum/gas/nitrogen][MOLES]
 			H.clear_alert("nitro")
 
@@ -192,7 +222,7 @@
 		else
 			H.failed_last_breath = FALSE
 			if(H.health >= H.crit_threshold)
-				H.adjustOxyLoss(-5)
+				H.adjustOxyLoss(-5*((damage/health)/2))
 			gas_breathed = breath_gases[/datum/gas/carbon_dioxide][MOLES]
 			H.clear_alert("not_enough_co2")
 
@@ -222,7 +252,7 @@
 		else
 			H.failed_last_breath = FALSE
 			if(H.health >= H.crit_threshold)
-				H.adjustOxyLoss(-5)
+				H.adjustOxyLoss(-5*((damage/health)/2))
 			gas_breathed = breath_gases[/datum/gas/plasma][MOLES]
 			H.clear_alert("not_enough_tox")
 
@@ -372,9 +402,12 @@
 		var/cold_modifier = H.dna.species.coldmod
 		if(breath_temperature < cold_level_3_threshold)
 			H.apply_damage_type(cold_level_3_damage*cold_modifier, cold_damage_type)
+			adjustLungLoss(cold_level_3_damage*cold_modifier)
 		if(breath_temperature > cold_level_3_threshold && breath_temperature < cold_level_2_threshold)
 			H.apply_damage_type(cold_level_2_damage*cold_modifier, cold_damage_type)
+			adjustLungLoss(cold_level_2_damage*cold_modifier)
 		if(breath_temperature > cold_level_2_threshold && breath_temperature < cold_level_1_threshold)
+			adjustLungLoss(cold_level_1_damage*cold_modifier)
 			H.apply_damage_type(cold_level_1_damage*cold_modifier, cold_damage_type)
 		if(breath_temperature < cold_level_1_threshold)
 			if(prob(20))
@@ -384,10 +417,13 @@
 		var/heat_modifier = H.dna.species.heatmod
 		if(breath_temperature > heat_level_1_threshold && breath_temperature < heat_level_2_threshold)
 			H.apply_damage_type(heat_level_1_damage*heat_modifier, heat_damage_type)
+			adjustLungLoss(cold_level_1_damage*heat_modifier)
 		if(breath_temperature > heat_level_2_threshold && breath_temperature < heat_level_3_threshold)
 			H.apply_damage_type(heat_level_2_damage*heat_modifier, heat_damage_type)
+			adjustLungLoss(cold_level_1_damage*heat_modifier)
 		if(breath_temperature > heat_level_3_threshold)
 			H.apply_damage_type(heat_level_3_damage*heat_modifier, heat_damage_type)
+			adjustLungLoss(cold_level_1_damage*heat_modifier)
 		if(breath_temperature > heat_level_1_threshold)
 			if(prob(20))
 				to_chat(H, "<span class='warning'>You feel [hot_message] in your [name]!</span>")
@@ -406,12 +442,14 @@
 	safe_oxygen_max = 0 // Like, at all.
 	safe_toxins_min = 16 //We breath THIS!
 	safe_toxins_max = 0
+	health = "plasma"//I don't understand how plamamen work, so I'm not going to try t give them special lungs atm
 
 /obj/item/organ/lungs/cybernetic
 	name = "cybernetic lungs"
 	desc = "A cybernetic version of the lungs found in traditional humanoid entities. It functions the same as an organic lung and is merely meant as a replacement."
 	icon_state = "lungs-c"
 	synthetic = TRUE
+	health = 600
 
 /obj/item/organ/lungs/cybernetic/emp_act()
 	. = ..()
@@ -431,6 +469,7 @@
 	cold_level_1_threshold = 200
 	cold_level_2_threshold = 140
 	cold_level_3_threshold = 100
+	health = 750
 
 /obj/item/organ/lungs/ashwalker
 	name = "ash lungs"
diff --git a/code/modules/surgery/organs/tongue.dm b/code/modules/surgery/organs/tongue.dm
index 86916217be..5dadd2a729 100644
--- a/code/modules/surgery/organs/tongue.dm
+++ b/code/modules/surgery/organs/tongue.dm
@@ -41,6 +41,9 @@
 		M.apply_damage(damage_mod, BURN, target)
 		to_chat(M, "<span class='userdanger'>The drink burns your skull! Oof, your bones!</span>")
 		return
+	if(damage+damage_mod < 0)
+		damage = 0
+		return
 
 	damage += damage_mod
 	if ((damage / maxHealth) > 1)
diff --git a/modular_citadel/code/modules/reagents/chemistry/reagents/fermi_reagents.dm b/modular_citadel/code/modules/reagents/chemistry/reagents/fermi_reagents.dm
index fcfda529d8..52b086b9c3 100644
--- a/modular_citadel/code/modules/reagents/chemistry/reagents/fermi_reagents.dm
+++ b/modular_citadel/code/modules/reagents/chemistry/reagents/fermi_reagents.dm
@@ -22,7 +22,8 @@
 	//holder.remove_reagent(src.id, metabolization_rate / M.metabolism_efficiency, FALSE) //fermi reagents stay longer if you have a better metabolism
 	//return ..()
 
-/datum/reagent/fermi/proc/fermiCreate(holder) //You can get holder by reagents.holder WHY DID I LEARN THIS NOW???
+//Called when reaction stops.
+/datum/reagent/fermi/proc/fermiFinish(holder) //You can get holder by reagents.holder WHY DID I LEARN THIS NOW???
 	return
 
 //This should process fermichems to find out how pure they are and what effect to do.
@@ -584,7 +585,7 @@ IMPORTANT FACTORS TO CONSIDER WHILE BALANCING
 	InverseChem 		= "BEsmaller" //At really impure vols, it just becomes 100% inverse
 
 /datum/reagent/fermi/BElarger/on_mob_add(mob/living/carbon/M)
-	..()
+	. = ..()
 	var/mob/living/carbon/human/H = M
 	var/obj/item/organ/genital/breasts/B = H.getorganslot("breasts")
 	if(!B)
@@ -1042,7 +1043,7 @@ And as stated earlier, this chem is hard to make, and is punishing on failure. Y
 	message_admins("name: [creatorName], ID: [creatorID], gender: [creatorGender], creator:[creator]")
 
 /datum/reagent/fermi/enthrall/on_mob_add(mob/living/carbon/M)
-	..()
+	. = ..()
 	if(!creatorID)
 		CRASH("Something went wrong in enthral creation")
 	else if(M.key == creatorID && creatorName == M.real_name) //same name AND same player - same instance of the player. (should work for clones?)
@@ -1114,7 +1115,7 @@ And as stated earlier, this chem is hard to make, and is punishing on failure. Y
 
 
 /datum/reagent/fermi/hatmium/on_mob_add(mob/living/carbon/human/M)
-	//var/mob/living/carbon/human/o = M
+	. = ..()
 	var/items = M.get_contents()
 	for(var/obj/item/W in items)
 		if(W == M.head)
diff --git a/modular_citadel/code/modules/reagents/chemistry/recipes/FermiCalc.Py b/modular_citadel/code/modules/reagents/chemistry/recipes/FermiCalc.Py
new file mode 100644
index 0000000000..d78b49ff30
--- /dev/null
+++ b/modular_citadel/code/modules/reagents/chemistry/recipes/FermiCalc.Py
@@ -0,0 +1,7 @@
+# -*- coding: utf-8 -*-
+"""
+Created on Fri May 17 05:12:17 2019
+
+@author: Fermi
+"""
+
diff --git a/modular_citadel/code/modules/reagents/chemistry/recipes/fermi.dm b/modular_citadel/code/modules/reagents/chemistry/recipes/fermi.dm
index 425d54becf..bd17353382 100644
--- a/modular_citadel/code/modules/reagents/chemistry/recipes/fermi.dm
+++ b/modular_citadel/code/modules/reagents/chemistry/recipes/fermi.dm
@@ -1,6 +1,14 @@
 //TO TWEAK:
 
-/datum/chemical_reaction/eigenstate
+//Called for every reaction step
+/datum/chemical_reaction/fermi/proc/FermiCreate(holder) //You can get holder by reagents.holder WHY DID I LEARN THIS NOW???
+	return
+
+//Called for every reaction step
+/datum/chemical_reaction/fermi/proc/FermiExplode(holder) //You can get holder by reagents.holder WHY DID I LEARN THIS NOW???
+	return
+
+/datum/chemical_reaction/fermi/eigenstate
 	name = "Eigenstasium"
 	id = "eigenstate"
 	results = list("eigenstate" = 1)
@@ -22,7 +30,7 @@
 	FermiChem = TRUE//If the chemical uses the Fermichem reaction mechanics
 	FermiExplode = FALSE //If the chemical explodes in a special way
 
-/datum/chemical_reaction/eigenstate/on_reaction(datum/reagents/holder)
+/datum/chemical_reaction/eigenstate/FermiCreate(datum/reagents/holder)
 	var/location = get_turf(holder.my_atom)
 	var/datum/reagent/fermi/eigenstate/E = locate(/datum/reagent/fermi/eigenstate) in holder.reagent_list
 	E.location_created = location