auxtools atmos works now

code/modules/atmospherics/environmental/LINDA_turf_tile.dm

@@ -38,7 +38,7 @@
 	if(!blocks_air)
 		air = new(2500,src)
 		air.copy_from_turf(src)
-		update_air_ref(!planetary_atmos)
+		update_air_ref(planetary_atmos ? 1 : 2)
 	. = ..()
 
 /turf/open/Destroy()
@@ -121,7 +121,7 @@
 		if (nonoverlaying_gases[id])
 			continue
 		var/gas_overlay = GLOB.meta_gas_overlays[id]
-		if(gas_overlay && air.get_moles(id) > GLOB.meta_gas_visibility[META_GAS_MOLES_VISIBLE])
+		if(gas_overlay && air.get_moles(id) > GLOB.meta_gas_visibility[id])
 			new_overlay_types += gas_overlay[min(FACTOR_GAS_VISIBLE_MAX, CEILING(air.get_moles(id) / MOLES_GAS_VISIBLE_STEP, 1))]
 
 	if (atmos_overlay_types)

code/modules/atmospherics/gasmixtures/gas_mixture.dm

@@ -112,10 +112,9 @@ GLOBAL_LIST_INIT(auxtools_atmos_initialized,FALSE)
 		message_admins("[key_name(usr)] modified gas mixture [REF(src)]: Changed volume to [volume].")
 		set_volume(volume)
 
-/*
 /datum/gas_mixture/Del()
 	__gasmixture_unregister()
-	. = ..()*/
+	. = ..()
 
 /datum/gas_mixture/proc/__gasmixture_unregister()
 /datum/gas_mixture/proc/__gasmixture_register()