diff --git a/Rails/app/views/assays/_form.html.erb b/Rails/app/views/assays/_form.html.erb
index 480467a..344ee23 100644
--- a/Rails/app/views/assays/_form.html.erb
+++ b/Rails/app/views/assays/_form.html.erb
@@ -130,28 +130,28 @@
   <li>
     <h3><span data-tooltip="Select value ranges for the heatmaps for easier comparison between experiments.">Heatmap options</span></h3>
     <div class="field">
-    <%= f.label "Enter the range for the achieved growth on log scale." %><br />
-    <%= f.text_field(:totg_min, :type => 'number', :min => '0', :size => '2') %>
-    <%= f.label "-" %>
-    <%= f.text_field(:totg_max, :type => 'number', :min => '1', :size => '2') %>
+      <%= f.label "Enter the range for the achieved growth on log scale." %><br />
+      <%= f.text_field :totg_min, :size => '5' %>
+      <%= f.label "-" %>
+      <%= f.text_field :totg_max, :size => '5' %>
     </div>
     <div class="field">
-    <%= f.label "Enter the range for the achieved growth on linear scale." %><br />
-    <%= f.text_field(:totg_OD_min, :type => 'number', :min => '0', :size => '2') %>
-    <%= f.label "-" %>
-    <%= f.text_field(:totg_OD_max, :type => 'number', :min => '1', :size => '2') %>
+      <%= f.label "Enter the range for the achieved growth on linear scale." %><br />
+      <%= f.text_field :totg_OD_min, :size => '5' %>
+      <%= f.label "-" %>
+      <%= f.text_field :totg_OD_max, :size => '5' %>
     </div>
     <div class="field">
       <%= f.label "Enter the range for the max specific growth rate." %><br />
-      <%= f.text_field(:specg_min, :type => 'number', :min => '0', :size => '2') %>
+      <%= f.text_field(:specg_min, :size => '5') %>
       <%= f.label "-" %>
-      <%= f.text_field(:specg_max, :type => 'number', :min => '1', :size => '2') %>
+      <%= f.text_field(:specg_max, :size => '5') %>
     </div>
     <div class="field">
       <%= f.label "Enter the range for the lag time." %><br />
-      <%= f.text_field(:lagT_min, :type => 'number', :min => '0', :size => '2') %>
+      <%= f.text_field(:lagT_min, :size => '5') %>
       <%= f.label "-" %>
-      <%= f.text_field(:lagT_max, :type => 'number', :min => '1', :size => '2') %>
+      <%= f.text_field(:lagT_max, :size => '5') %>
     </div>
   </li>
   <div class="actions" style="margin-top:30px; clear:both;">