diff --git a/autotest/test_benchmark.py b/autotest/test_benchmark.py
index 79c22ea..59f6caa 100644
--- a/autotest/test_benchmark.py
+++ b/autotest/test_benchmark.py
@@ -1087,7 +1087,6 @@ def test_yaml(prefix):
     testdf = pd.read_csv(os.path.join(cwd, wd,f"sout.csv"), index_col = 0)
     compare_results(benchmarkdf, testdf)
 
-
 @pytest.mark.skip
 def test01_yaml(prefix = 'test01'):
 
diff --git a/src/mf6rtm/mf6rtm.py b/src/mf6rtm/mf6rtm.py
index f867519..025918f 100644
--- a/src/mf6rtm/mf6rtm.py
+++ b/src/mf6rtm/mf6rtm.py
@@ -116,6 +116,7 @@ class PhreeqcBMI(phreeqcrm.BMIPhreeqcRM):
     def __init__(self, yaml="mf6rtm.yaml"):
         phreeqcrm.BMIPhreeqcRM.__init__(self)
         self.initialize(yaml)
+        self.sat_now = None
 
     def get_grid_to_map(self):
         '''Function to get grid to map
@@ -158,14 +159,18 @@ def set_scalar(self, var_name, value):
     def _solve_phreeqcrm(self, dt, diffmask):
         '''Function to solve phreeqc bmi
         '''
-
         # status = phreeqc_rm.SetTemperature([self.init_temp[0]] * self.ncpl)
         # status = phreeqc_rm.SetPressure([2.0] * nxyz)
         self.SetTimeStep(dt*1.0/self.GetTimeConversion())
 
-        # update which cells to run depending on conc change between tsteps
-        sat = [1]*self.GetGridCellCount()
+        if self.sat_now is not None:
+            sat = self.sat_now
+        else:
+            sat = [1]*self.GetGridCellCount()
+
         self.SetSaturation(sat)
+
+        # update which cells to run depending on conc change between tsteps
         if diffmask is not None:
             # get idx where diffmask is 0
             inact = get_indices(0, diffmask)
@@ -211,17 +216,29 @@ def __init__(self, wd, dll):
         modflowapi.ModflowApi.__init__(self, dll, working_directory=wd)
         self.initialize()
         self.sim = flopy.mf6.MFSimulation.load(sim_ws=wd, verbosity_level=0)
+        self.fmi = False
 
     def _prepare_mf6(self):
         '''Prepare mf6 bmi for transport calculations
         '''
-        self.modelnmes = ['Flow'] + [nme.capitalize() for nme in self.sim.model_names if nme != 'gwf']
+        self.modelnmes = [nme.capitalize() for nme in self.sim.model_names]
         self.components = [nme.capitalize() for nme in self.sim.model_names[1:]]
         self.nsln = self.get_subcomponent_count()
         self.sim_start = datetime.now()
         self.ctimes = [0.0]
         self.num_fails = 0
 
+    def _check_fmi(self):
+        '''Check if fmi is in the nam file
+        '''
+        ...
+        return
+
+    def _set_simtype_gwt(self):
+        '''Set the gwt sim type as sequential or flow interface
+        '''
+        ...
+
     def _solve_gwt(self):
         '''Function to solve the transport loop
         '''
@@ -291,6 +308,26 @@ def __init__(self, wd, mf6api, phreeqcbmi):
         # set time conversion factor
         self.set_time_conversion()
 
+    def get_saturation_from_mf6(self):
+        """
+        Get the saturation
+
+        Parameters
+        ----------
+        mf6 (modflowapi): the modflow api object
+
+        Returns
+        -------
+        array: the saturation
+        """
+        sat = {component: self.mf6api.get_value(
+            self.mf6api.get_var_address("FMI/GWFSAT", f'{component}')
+            ) for component in self.phreeqcbmi.components}
+        # select the first component to get the length of the array
+        sat = sat[self.phreeqcbmi.components[0]] # saturation is the same for all components
+        self.phreeqcbmi.sat_now = sat # set phreeqcmbi saturation
+        return sat
+
     def get_time_units_from_mf6(self):
         '''Function to get the time units from mf6
         '''
@@ -467,8 +504,6 @@ def _update_selected_output(self):
     def __replace_inactive_cells_in_sout(self, sout, diffmask):
         '''Function to replace inactive cells in the selected output dataframe
         '''
-        components = self.mf6api.modelnmes[1:]
-        headers = self.phreeqcbmi.sout_headers
         # match headers in components closest string
 
         inactive_idx = get_indices(0, diffmask)
@@ -545,7 +580,7 @@ def _solve(self):
         assert self._check_sout_exist(), f'{self.sout_fname} not found'
 
         print("Starting transport solution at {0}".format(sim_start.strftime(DT_FMT)))
-        print(f"Solving the following components: {', '.join([nme for nme in self.mf6api.modelnmes])}")
+        # print(f"Solving the following components: {', '.join([nme for nme in self.mf6api.modelnmes])}")
         ctime = self._set_ctime()
         etime = self._set_etime()
         while ctime < etime:
@@ -556,6 +591,9 @@ def _solve(self):
             self.mf6api.prepare_time_step(dt)
             self.mf6api._solve_gwt()
 
+            # get saturation
+            self.get_saturation_from_mf6()
+
             if self.reactive:
                 # reaction block
                 c_dbl_vect = self._transfer_array_to_phreeqcrm()