diff --git a/tardis/io/atomic.py b/tardis/io/atomic.py
index 3ab59be373a..a76174036a6 100644
--- a/tardis/io/atomic.py
+++ b/tardis/io/atomic.py
@@ -452,7 +452,7 @@ def _create_collision_coefficient_matrix(self):
                 C_ul_matrix[level_number_lower, level_number_upper, :] = line.values[2:]
                 delta_E_matrix[level_number_lower, level_number_upper] = line['delta_e']
                 #TODO TARDISATOMIC fix change the g_ratio to be the otherway round - I flip them now here.
-                g_ratio_matrix[level_number_lower, level_number_upper] = 1/line['g_ratio']
+                g_ratio_matrix[level_number_lower, level_number_upper] = line['g_ratio']
             self.C_ul_interpolator[species] = interpolate.interp1d(
                     self.atom_data.collision_data_temperatures,
                     C_ul_matrix)
diff --git a/tardis/plasma/properties/partition_function.py b/tardis/plasma/properties/partition_function.py
index cb209a123b2..058dcb17bd1 100644
--- a/tardis/plasma/properties/partition_function.py
+++ b/tardis/plasma/properties/partition_function.py
@@ -124,7 +124,7 @@ def __init__(self, plasma_parent):
     def _main_nlte_calculation(
             self, atomic_data, nlte_data, t_electrons,
             j_blues, beta_sobolevs, general_level_boltzmann_factor,
-            previous_electron_densities, g):
+            previous_electron_densities):
         """
         The core of the NLTE calculation, used with all possible config.
         options.
@@ -189,14 +189,14 @@ def _main_nlte_calculation(
                                 'collision data?')
                     else:
                         raise e
-                general_level_boltzmann_factor[i].ix[species] = \
-                    level_boltzmann_factor * g.loc[species][0] / level_boltzmann_factor[0]
+                general_level_boltzmann_factor[i].loc[species] = \
+                    level_boltzmann_factor
         return general_level_boltzmann_factor
 
     def _calculate_classical_nebular(
             self, t_electrons, lines, atomic_data,
             nlte_data, general_level_boltzmann_factor, j_blues,
-            previous_electron_densities, g):
+            previous_electron_densities):
         """
         Performs NLTE calculations using the classical nebular treatment.
         All beta sobolev values taken as 1.
@@ -210,13 +210,13 @@ def _calculate_classical_nebular(
                 j_blues,
                 beta_sobolevs,
                 general_level_boltzmann_factor,
-                previous_electron_densities, g)
+                previous_electron_densities)
         return general_level_boltzmann_factor
 
     def _calculate_coronal_approximation(
             self, t_electrons, lines, atomic_data,
             nlte_data, general_level_boltzmann_factor,
-            previous_electron_densities, g):
+            previous_electron_densities):
         """
         Performs NLTE calculations using the coronal approximation.
         All beta sobolev values taken as 1 and j_blues taken as 0.
@@ -226,13 +226,13 @@ def _calculate_coronal_approximation(
         general_level_boltzmann_factor = self._main_nlte_calculation(
             atomic_data, nlte_data, t_electrons, j_blues,
             beta_sobolevs, general_level_boltzmann_factor,
-            previous_electron_densities, g)
+            previous_electron_densities)
         return general_level_boltzmann_factor
 
     def _calculate_general(
             self, t_electrons, lines, atomic_data, nlte_data,
             general_level_boltzmann_factor, j_blues,
-            previous_beta_sobolev, previous_electron_densities, g):
+            previous_beta_sobolev, previous_electron_densities):
         """
         Full NLTE calculation without approximations.
         """
@@ -244,7 +244,7 @@ def _calculate_general(
         general_level_boltzmann_factor = self._main_nlte_calculation(
             atomic_data, nlte_data, t_electrons, j_blues,
             beta_sobolevs, general_level_boltzmann_factor,
-            previous_electron_densities, g)
+            previous_electron_densities)
         return general_level_boltzmann_factor