diff --git a/check-snapshot-age b/check-snapshot-age
index 664d2c5..31f32d9 100644
--- a/check-snapshot-age
+++ b/check-snapshot-age
@@ -3,32 +3,42 @@
 import subprocess
 import re
 import time
+import argparse
 
-#_snapshots = open("zfs.txt","r").read()
+# Argumente verarbeiten
+parser = argparse.ArgumentParser(description="ZFS Snapshot Übersicht")
+parser.add_argument("--filter", help="Nur bestimmte Datasets anzeigen (Regex möglich, z. B. 'rpool/ROOT')", type=str)
+args = parser.parse_args()
+
+# Snapshots abrufen
 _snapshots = subprocess.check_output("/usr/sbin/zfs list -t snapshot -Hpo name,creation".split())
 
-LABELS=("frequent","hourly","daily","weekly","monthly","yearly","backup-zfs","bashclub-zfs")
+LABELS = ("frequent", "hourly", "daily", "weekly", "monthly", "yearly", "backup-zfs", "bashclub-zfs")
 RE_LABELSEARCH = re.compile("|".join(LABELS))
 _datasets = {}
-for _datastore,_snapshot,_creation in re.findall("^([\w_./-]+)@([\w_.-]+)\t(\d+)",_snapshots.decode('utf-8'),re.M):
+
+# Snapshots parsen
+for _datastore, _snapshot, _creation in re.findall(r"^([\w_./-]+)@([\w_.-]+)\t(\d+)", _snapshots.decode('utf-8'), re.M):
+    if args.filter and not re.search(args.filter, _datastore):
+        continue  # Dataset entspricht nicht dem Filter
+
     if _datastore not in _datasets:
         _datasets[_datastore] = {}
     _label = RE_LABELSEARCH.search(_snapshot)
-    if _label:
-        _label = _label.group(0)
-    else:
-        _label = "other"
+    _label = _label.group(0) if _label else "other"
+
     if _label not in _datasets[_datastore]:
         _datasets[_datastore][_label] = []
-    _datasets[_datastore][_label].append((_snapshot,int(_creation)))
+    _datasets[_datastore][_label].append((_snapshot, int(_creation)))
 
+# Ergebnisse anzeigen
 for _datastore in _datasets.keys():
     print(_datastore)
-    print("-"*40)
+    print("-" * 40)
     for _label in _datasets[_datastore].keys():
         _data = _datasets[_datastore][_label]
-        _first = time.strftime("%d.%m.%Y %H:%M:%S",time.localtime(_data[0][1]))
-        _last = time.strftime("%d.%m.%Y %H:%M:%S",time.localtime(_data[-1][1]))
+        _first = time.strftime("%d.%m.%Y %H:%M:%S", time.localtime(_data[0][1]))
+        _last = time.strftime("%d.%m.%Y %H:%M:%S", time.localtime(_data[-1][1]))
         _count = len(_data)
         print(f" {_label} {_count}")
         print(f"   {_first} {_data[0][0]}")