diff --git a/ceph/meta/prometheus.yml b/ceph/meta/prometheus.yml
index 2969b6f..04a4362 100644
--- a/ceph/meta/prometheus.yml
+++ b/ceph/meta/prometheus.yml
@@ -156,6 +156,7 @@
   {%- else -%}
 
     {%- if mon is defined and mon.get('enabled') %}
+      {%- set pool_used_space = 'ceph_pool_bytes_used' if common.version in ['luminous'] else 'ceph_pool_stored' -%}
       {%- raw %}
 server:
   recording:
@@ -366,7 +367,7 @@
     CephPool{{pool_name|replace(".", "")|replace("-", "")}}SpaceUsageWarning:
           {%- set threshold = monitoring_pool.pool_space_used_utilization_warning_threshold|default('0.75')|float %}
       if: >-
-        ceph_pool_stored / (ceph_pool_stored + ceph_pool_max_avail) * on(pool_id) group_left(name) ceph_pool_metadata{name="{{pool_name}}"} > {{threshold}}
+        {{pool_used_space}} / ({{pool_used_space}} + ceph_pool_max_avail) * on(pool_id) group_left(name) ceph_pool_metadata{name="{{pool_name}}"} > {{threshold}}
       for: 3m
       labels:
         severity: warning
@@ -377,7 +378,7 @@
     CephPool{{pool_name|replace(".", "")|replace("-", "")}}SpaceUsageCritical:
           {%- set threshold = monitoring_pool.pool_space_used_critical_threshold|default('0.85')|float %}
       if: >-
-        ceph_pool_stored / (ceph_pool_stored + ceph_pool_max_avail) * on(pool_id) group_left(name) ceph_pool_metadata{name="{{pool_name}}"} > {{threshold}}
+        {{pool_used_space}} / ({{pool_used_space}} + ceph_pool_max_avail) * on(pool_id) group_left(name) ceph_pool_metadata{name="{{pool_name}}"} > {{threshold}}
       for: 3m
       labels:
         severity: minor
@@ -390,7 +391,7 @@
       {%- set threshold = monitoring.prediction_threshold %}
       {%- set space_threshold = monitoring_pool.space_threshold %}
       if: >-
-        predict_linear(ceph_pool_stored[{{threshold}}d], {{threshold}} * 86400) * on(pool_id) group_left(name) ceph_pool_metadata{name="{{pool_name}}"} > (ceph_pool_stored + ceph_pool_max_avail) * {{space_threshold}} * on(pool_id) group_left(name) ceph_pool_metadata{name="{{pool_name}}"}
+        predict_linear({{pool_used_space}}[{{threshold}}d], {{threshold}} * 86400) * on(pool_id) group_left(name) ceph_pool_metadata{name="{{pool_name}}"} > ({{pool_used_space}} + ceph_pool_max_avail) * {{space_threshold}} * on(pool_id) group_left(name) ceph_pool_metadata{name="{{pool_name}}"}
       for: 30m
       labels:
         severity: minor