diff --git a/code/__DEFINES/reagents.dm b/code/__DEFINES/reagents.dm
index b40ff65196..913cb70cef 100644
--- a/code/__DEFINES/reagents.dm
+++ b/code/__DEFINES/reagents.dm
@@ -88,6 +88,7 @@
 #define REACTION_CLEAR_IMPURE       (1<<0)  //Convert into impure/pure on reaction completion
 #define REACTION_CLEAR_INVERSE      (1<<1)  //Convert into inverse on reaction completion when purity is low enough
 
+///GS13 edit
 ///The minimum volume of reagents than can be operated on.
 #define CHEMICAL_QUANTISATION_LEVEL 0.0001
 
diff --git a/code/datums/components/plumbing/_plumbing.dm b/code/datums/components/plumbing/_plumbing.dm
index cc80581866..ad2050e401 100644
--- a/code/datums/components/plumbing/_plumbing.dm
+++ b/code/datums/components/plumbing/_plumbing.dm
@@ -66,7 +66,7 @@
 		var/datum/component/plumbing/supplier = A
 		if(supplier.can_give(amount, reagent, net))
 			valid_suppliers += supplier
-	// Need to ask for each in turn very carefully, making sure we get the total volume. This is to avoid a division that would always round down and become 0
+	///GS13 Edit: Need to ask for each in turn very carefully, making sure we get the total volume. This is to avoid a division that would always round down and become 0
 	var/targetVolume = reagents.total_volume = amount
 	var/suppliersLeft = valid_suppliers.len
 	for(var/A in valid_suppliers)
diff --git a/code/datums/components/plumbing/reaction_chamber.dm b/code/datums/components/plumbing/reaction_chamber.dm
index 6bd1464e59..3019e99a44 100644
--- a/code/datums/components/plumbing/reaction_chamber.dm
+++ b/code/datums/components/plumbing/reaction_chamber.dm
@@ -23,7 +23,7 @@
 			var/datum/reagent/RD = A
 			if(RT == RD.type)
 				has_reagent = TRUE
-				if(RD.volume + CHEMICAL_QUANTISATION_LEVEL < RC.required_reagents[RT]) // Allow the chamber to exit filling mode when it feels it has enough even if short by a tiny fraction
+				if(RD.volume + CHEMICAL_QUANTISATION_LEVEL < RC.required_reagents[RT]) //GS13 Edit: Allow the chamber to exit filling mode when it feels it has enough even if short by a tiny fraction
 					process_request(min(RC.required_reagents[RT] - RD.volume, MACHINE_REAGENT_TRANSFER) , RT, dir)
 					return
 		if(!has_reagent)