every 3 hours send

src/controllers/tanksController.js

@@ -7303,7 +7303,7 @@ cron.schedule('* * * * *', async () => {
 });
 
 //run the every one hour
-cron.schedule('0 * * * *', async () => {  
+cron.schedule('0 */3 * * *', async () => {  
   console.log("Checking for user notification times...");
   await calculateLowWaterLevelAndNotify();
   await calculateCriticalLowWaterLevelAndNotify();
@@ -7311,6 +7311,7 @@ cron.schedule('0 * * * *', async () => {
   timezone: "Asia/Kolkata",
 });
 
+
 // Schedule notifications at 6 AM, 12 PM, 6 PM, and 12 AM
 // cron.schedule(
 //   "0 6,12,18,0 * * *", // Cron expression for the required times