diff -r cbace196bdbf -r 69fadd1aded2 www/includes/db_inventory_water.php
--- a/www/includes/db_inventory_water.php	Mon Feb 25 22:53:41 2019 +0100
+++ b/www/includes/db_inventory_water.php	Tue Feb 26 16:18:16 2019 +0100
@@ -86,6 +86,7 @@
 			'cost' => $row['cost']
 		);
 	}
+	header("Content-type: application/json");
 	echo json_encode($waters);
 }
 ?>