diff --git a/rowers/forms.py b/rowers/forms.py
index 02f970a6..805abc7b 100644
--- a/rowers/forms.py
+++ b/rowers/forms.py
@@ -156,9 +156,9 @@ class InstrokeForm(forms.Form):
                                            required=False)
     spm_min = forms.IntegerField(initial=15,label='SPM Min',widget=HiddenInput)
     spm_max = forms.IntegerField(initial=45,label='SPM Max',widget=HiddenInput)
-    activeminutesmin = forms.IntegerField(
+    activeminutesmin = forms.FloatField(
         required=False, initial=0, widget=forms.HiddenInput())
-    activeminutesmax = forms.IntegerField(
+    activeminutesmax = forms.FloatField(
         required=False, initial=0, widget=forms.HiddenInput())
     notes = forms.CharField(required=False,
                             max_length=200, label='Notes',
diff --git a/rowers/interactiveplots.py b/rowers/interactiveplots.py
index 87a7ec9c..a239928a 100644
--- a/rowers/interactiveplots.py
+++ b/rowers/interactiveplots.py
@@ -4209,7 +4209,7 @@ def forcecurve_multi_interactive_chart(selected):
     return (script, div)
 
 def instroke_multi_interactive_chart(selected, *args, **kwargs):
-    
+
     df_plot = pd.DataFrame()
     ids = [analysis.id for analysis in selected]
     metrics = list(set([analysis.metric for analysis in selected]))
@@ -4318,7 +4318,7 @@ def instroke_interactive_chart(df,metric, workout, spm_min, spm_max,
     df_pos = (df+abs(df))/2.
     df_min = -(-df+abs(-df))/2.
 
-    mean_vals = df.median()
+    mean_vals = df.median().replace(0, np.nan)
     q75 = df_pos.quantile(q=0.75).replace(0,np.nan)
     q25 = df_pos.quantile(q=0.25).replace(0,np.nan)
     q75min = df_min.quantile(q=0.75).replace(0,np.nan)
@@ -4404,9 +4404,9 @@ def instroke_interactive_chart(df,metric, workout, spm_min, spm_max,
                   text_color='black',
                   )
 
-    s2 = 'Time: {activeminutesmin} - {activeminutesmax} min'.format(
-        activeminutesmin=activeminutesmin,
-        activeminutesmax=activeminutesmax
+    s2 = 'Time: {activeminutesmin} - {activeminutesmax}'.format(
+        activeminutesmin=datetime.timedelta(seconds=60*activeminutesmin),
+        activeminutesmax=datetime.timedelta(seconds=60*activeminutesmax)
     )
 
     label2 = Label(x=50,y=400, x_units='screen', y_units='screen',
@@ -4453,7 +4453,12 @@ def instroke_interactive_chart(df,metric, workout, spm_min, spm_max,
 
     plot.add_tools(HoverTool(tooltips=TIPS))
 
-    script, div = components(plot)
+    try:
+        script, div = components(plot)
+    except ValueError:
+        script = ""
+        div = "Something went wrong with the chart"
+
 
     return (script, div)
 
diff --git a/rowers/templates/instroke_interactive.html b/rowers/templates/instroke_interactive.html
index 44e599a0..cad3bd0e 100644
--- a/rowers/templates/instroke_interactive.html
+++ b/rowers/templates/instroke_interactive.html
@@ -83,21 +83,29 @@ $( function() {
   });
 </script>
 <script>
+  function secondsToHMS(s) {
+    var h = Math.floor(s/3600); // Hours
+    s -= h*3600;
+    var m = Math.floor(s/60); // Minutes
+    s -= m*60;
+    return h+":"+(m < 10 ? '0'+m : m)+":"+(s < 10 ? '0'+s : s); //zero padding on minutes and seconds
+}
 $( function() {
   console.log({{ activeminutesmin }}, {{ activeminutesmax}}, 'active range');
   $( "#slider-timerange" ).slider({
     range: true,
     min: 0,
-    max: {{ maxminutes }},
-    values: [ {{ activeminutesmin }}, {{ activeminutesmax }} ],
+    max: {{ maxminutes|times60 }},
+    step: 1,
+    values: [ {{ activeminutesmin|times60 }}, {{ activeminutesmax|times60 }} ],
     slide: function( event, ui ) {
-      $( "#amount" ).val(ui.values[ 0 ] + " min - " + ui.values[ 1 ] + " min " );
-      $("#id_activeminutesmin").val(ui.values[0]);
-      $("#id_activeminutesmax").val(ui.values[1]);
+      $( "#amount" ).val(secondsToHMS(ui.values[ 0 ]) + " - " + secondsToHMS(ui.values[ 1 ]) );
+      $("#id_activeminutesmin").val(ui.values[0]/60);
+      $("#id_activeminutesmax").val(ui.values[1]/60);
     }
   });
-  $( "#amount" ).val($( "#slider-timerange" ).slider( "values", 0 ) +
-    " min - " + $( "#slider-timerange" ).slider( "values", 1 ) + " min ");
+  $( "#amount" ).val(secondsToHMS($( "#slider-timerange" ).slider( "values", 0 )) +
+    " min - " + secondsToHMS($( "#slider-timerange" ).slider( "values", 1 )));
 } );
 </script>
 {% endblock %}
diff --git a/rowers/templatetags/rowerfilters.py b/rowers/templatetags/rowerfilters.py
index ba04a374..a1e234ab 100644
--- a/rowers/templatetags/rowerfilters.py
+++ b/rowers/templatetags/rowerfilters.py
@@ -393,6 +393,9 @@ def aantalcomments(workout):
 
     return aantalcomments
 
+@register.filter
+def times60(s):
+    return s*60
 
 @register.filter
 def encode(id):