diff --git a/phpmon/Domain/DomainList/Cells/DomainListPhpCell.swift b/phpmon/Domain/DomainList/Cells/DomainListPhpCell.swift
index e1aa67c..65bd1c5 100644
--- a/phpmon/Domain/DomainList/Cells/DomainListPhpCell.swift
+++ b/phpmon/Domain/DomainList/Cells/DomainListPhpCell.swift
@@ -23,12 +23,16 @@ class DomainListPhpCell: NSTableCellView, DomainListCellProtocol
         
         buttonPhpVersion.title = " PHP \(site.servingPhpVersion)"
         
+        imageViewPhpVersionOK.toolTip = nil
+        
         if site.isolatedPhpVersion != nil {
             imageViewPhpVersionOK.isHidden = false
             imageViewPhpVersionOK.image = NSImage(named: "Isolated")
+            imageViewPhpVersionOK.toolTip = "domain_list.tooltips.isolated".localized(site.servingPhpVersion)
         } else {
             imageViewPhpVersionOK.isHidden = (site.composerPhp == "???" || !site.composerPhpCompatibleWithLinked)
             imageViewPhpVersionOK.image = NSImage(named: "Checkmark")
+            imageViewPhpVersionOK.toolTip = "domain_list.tooltips.checkmark".localized(site.composerPhp)
         }
     }
     
diff --git a/phpmon/Localizable.strings b/phpmon/Localizable.strings
index 7296f74..1b23f3f 100644
--- a/phpmon/Localizable.strings
+++ b/phpmon/Localizable.strings
@@ -71,6 +71,9 @@
 "domain_list.title" = "Domains";
 "domain_list.subtitle" = "Linked & Parked";
 
+"domain_list.tooltips.isolated" = "This domain is isolated and using PHP %@ instead of the globally linked PHP.";
+"domain_list.tooltips.checkmark" = "This domain is being served with a version of PHP that is compatible with this requirement (PHP %@). Click on the PHP version next to this checkmark to find out more information about how this requirement was determined.";
+
 "domain_list.alerts_isolation_failed.title" = "Oops! Site Not Isolated";
 "domain_list.alerts_isolation_failed.subtitle" = "Something went wrong trying to isolate this site. If this is your default site but it is not linked, I recommend manually linking the site prior to setting up isolation.";
 "domain_list.alerts_isolation_failed.desc" = "To find out what goes wrong, you can try running the command in your terminal manually: %@";