diff --git a/ceph/files/grafana_dashboards/ceph_pools_prometheus.json b/ceph/files/grafana_dashboards/ceph_pools_prometheus.json
index 74ca5de..61e2780 100644
--- a/ceph/files/grafana_dashboards/ceph_pools_prometheus.json
+++ b/ceph/files/grafana_dashboards/ceph_pools_prometheus.json
@@ -158,7 +158,7 @@
           "steppedLine": false,
           "targets": [
             {
-              "expr": "avg(ceph_pool_usage_max_avail{name=\"$pool\"}) - avg(ceph_pool_usage_bytes_used{name=\"$pool\"})",
+              "expr": "avg(ceph_pool_usage_max_avail{name=\"$pool\"})",
               "format": "time_series",
               "interval": "",
               "intervalFactor": 1,
@@ -178,7 +178,7 @@
               "step": 60
             },
             {
-              "expr": "avg(ceph_pool_usage_max_avail{name=\"$pool\"})",
+              "expr": "avg(ceph_pool_usage_max_avail{name=\"$pool\"}) + avg(ceph_pool_usage_bytes_used{name=\"$pool\"})",
               "format": "time_series",
               "interval": "",
               "intervalFactor": 1,
@@ -284,7 +284,7 @@
           "tableColumn": "",
           "targets": [
             {
-              "expr": "avg(ceph_pool_usage_bytes_used{name=\"$pool\"}) / avg(ceph_pool_usage_max_avail{name=\"$pool\"})",
+              "expr": "avg(ceph_pool_usage_bytes_used{name=\"$pool\"}) / (avg(ceph_pool_usage_max_avail{name=\"$pool\"}) + avg(ceph_pool_usage_bytes_used{name=\"$pool\"}))",
               "format": "time_series",
               "interval": "",
               "intervalFactor": 1,