diff --git a/app/src/main/java/ru/volgorobot/vrcatalog/MainActivity.java b/app/src/main/java/ru/volgorobot/vrcatalog/MainActivity.java
index a287510..7ff9c58 100644
--- a/app/src/main/java/ru/volgorobot/vrcatalog/MainActivity.java
+++ b/app/src/main/java/ru/volgorobot/vrcatalog/MainActivity.java
@@ -122,9 +122,6 @@ public class MainActivity extends AppCompatActivity
             firstLevelNodes.add(new TreeNode(firstLevelObjects.get(i).getName()));
             firstLevelNodes.get(i).setLevel(0);
             firstLevelNodes.get(i).setChildren(getSecondLevelNodesByParentID(firstLevelObjects.get(i).getID()));
-            for (int j = 0; j < firstLevelNodes.get(i).getChildren().size(); j++) {
-                firstLevelNodes.get(i).getChildren().get(j).setChildren(getThirdLevelNodesByParentName((String) firstLevelNodes.get(i).getChildren().get(j).getValue()));
-            }
         }
 
         rootNode.setChildren(firstLevelNodes);
@@ -174,18 +171,9 @@ public class MainActivity extends AppCompatActivity
     private void getTreeData(final boolean clean) throws IllegalStateException {
         mSwipeRefreshLayout.setRefreshing(true);
         if(clean) {
-            for (int i = 0; i < firstLevelNodes.size(); i++) {
-                firstLevelNodes.remove(i);
-            }
-            for (int i = 0; i < firstLevelObjects.size(); i++) {
-                firstLevelObjects.remove(i);
-            }
-            for (int i = 0; i < secondLevelObjects.size(); i++) {
-                secondLevelObjects.remove(i);
-            }
-            for (int i = 0; i < thirdLevelObjects.size(); i++) {
-                thirdLevelObjects.remove(i);
-            }
+            firstLevelNodes.removeAll(firstLevelNodes);
+            firstLevelObjects.removeAll(firstLevelObjects);
+            secondLevelObjects.removeAll(secondLevelObjects);
         }
         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
         String baseURL = sharedPreferences.getString("addressOfServer", "");
@@ -210,14 +198,6 @@ public class MainActivity extends AppCompatActivity
                                 return 2;
                             }
                         }
-                        for (int i = 0; i < secondLevelObjects.size(); i++) {
-                            Response<List<ThirdLevelModel>> thirdLevelResponse = vrApi.getDetails(secondLevelObjects.get(i).getID()).execute();
-                            if(thirdLevelResponse.isSuccessful()) {
-                                thirdLevelObjects.addAll(thirdLevelResponse.body());
-                            } else {
-                                return 2;
-                            }
-                        }
                     } else {
                         return 2;
                     }