diff --git a/uptimekuma.sh b/uptimekuma.sh
index 3a68a48..5d03456 100644
--- a/uptimekuma.sh
+++ b/uptimekuma.sh
@@ -1,13 +1,24 @@
+#!/bin/bash
+
+# Check various system health statistics and push them to Uptime Kuma
+# Triggers a "down" alert if a stat is above the threshold,
+# and sends info about what's wrong
+# Also supports checking ZFS pool health
+
 API_URL="https://status.netsyms.net/api/push/"
-PUSH_KEY=""
-DISK_FULL_ALERT_PERCENT_THRESHOLD=85
-CPU_USAGE_PERCENT_THRESHOLD=60
-MEM_USAGE_PERCENT_THRESHOLD=80
+PUSH_KEY="" # The random code in the URL generated by Uptime Kuma
+ENABLE_ZFS_MONITOR=1 # Set to 0 if you aren't using ZFS
+DISK_FULL_ALERT_PERCENT_THRESHOLD=85 # Alerts if any filesystem is fuller than this
+CPU_USAGE_PERCENT_THRESHOLD=60 # Alerts if CPU usage averages greater than this across 5 minutes
+MEM_USAGE_PERCENT_THRESHOLD=80 # Alerts if RAM usage rises over this percentage, ZFS ARC counts as used
 
 # ZFS health
-echo -n "Checking ZFS health: "
-ZFS_STATUS=$(zpool status -x | grep -q "all pools are healthy" && echo "OK" || zpool status -x)
-echo "$ZFS_STATUS"
+ZFS_STATUS="OK"
+if [[ $ENABLE_ZFS_MONITOR == 1 ]]; then
+  echo -n "Checking ZFS health: "
+  ZFS_STATUS=$(zpool status -x | grep -q "all pools are healthy" && echo "OK" || zpool status -x)
+  echo "$ZFS_STATUS"
+fi
 
 # Disk usage
 echo -n "Checking disk usage: "