diff --git a/app/src/main/java/com/batzeesappstudio/citytraffic/MainActivity.java b/app/src/main/java/com/batzeesappstudio/citytraffic/MainActivity.java
index 48adaec..bd1dde7 100644
--- a/app/src/main/java/com/batzeesappstudio/citytraffic/MainActivity.java
+++ b/app/src/main/java/com/batzeesappstudio/citytraffic/MainActivity.java
@@ -619,7 +619,10 @@ private void addmarker(GeoLocation geo) {
 
     private void deleteMarkersFromServer(){
         //Query applesQuery = mDatabase.limitToFirst(100);
-        Query applesQuery = mDatabase.orderByKey();
+        //Query applesQuery = mDatabase.orderByKey();
+            
+        Date date = new Date(System.currentTimeMillis() - (900000)); //900000 is 15 minutes in ms
+        Query applesQuery = mDatabase.endAt(date);
 
         applesQuery.addListenerForSingleValueEvent(new ValueEventListener() {
             @Override