diff --git a/modules/rhizo_base/files/bin/monitor_bts.sh b/modules/rhizo_base/files/bin/monitor_bts.sh
index 716fb8a..8ca1023 100755
--- a/modules/rhizo_base/files/bin/monitor_bts.sh
+++ b/modules/rhizo_base/files/bin/monitor_bts.sh
@@ -7,6 +7,8 @@ $RHIZO_SCRIPT/monitor_amp.sh
 
 for bts in "${BTS[@]}" ; do
 
+    if [ "$bts" == "" ] ; then continue ; fi
+
     _f="/tmp/bts.error.$bts"
 
     fping -q -c5 -p90 $bts >/dev/null 2>&1
@@ -24,16 +26,14 @@ for bts in "${BTS[@]}" ; do
 	else
 		# And this is a new condition, so initialise counter and alert
 		echo 1 > $_f
-		/usr/local/bin/alert.sh noenc "%F0%9F%98%BF" > /dev/null
-		/usr/local/bin/alert.sh "$HOSTNAME: BTS $bts no responde a ping." > /dev/null
+		/usr/local/bin/alert.sh noenc "%F0%9F%98%BF" "$HOSTNAME: BTS $bts no responde a ping." > /dev/null
 	fi
     else
 	# BTS is OK
 	if [ -f $_f ] ; then
 		# This is cancelling a previous error condition, Remove counter and alert.
 		rm $_f
-		/usr/local/bin/alert.sh noenc "%F0%9F%98%B8" > /dev/null
-		/usr/local/bin/alert.sh "$HOSTNAME: BTS $bts vuelve a responder a ping!" > /dev/null
+		/usr/local/bin/alert.sh noenc "%F0%9F%98%BB" "$HOSTNAME: BTS $bts vuelve a responder a ping!" > /dev/null
 	fi
 fi
 done