diff --git a/src/controllers/tanksController.js b/src/controllers/tanksController.js
index 0d32f301..ff66269c 100644
--- a/src/controllers/tanksController.js
+++ b/src/controllers/tanksController.js
@@ -121,6 +121,8 @@ exports.getTank = async (req, reply) => {
     throw boom.boomify(err);
   }
 };
+
+
 //exports.getTanklevels = async (req, reply) => {
 //  try {
  // const customerId = req.params.customerId;
@@ -150,7 +152,7 @@ exports.updateTanklevels = async (req, reply) => {
     for (const tank of tanks) {
       const tankId = tank._id;
       let capacity = parseInt(tank.capacity.replace(/,/g, ''), 10);
-      let waterLevel = capacity - 100; // initial water level
+      let waterLevel = parseInt(tank.waterlevel.replace(/,/g, ''), 10);
 
       const intervalId = setInterval(async function () {
         const newWaterLevel = Math.floor(waterLevel - 200);