help fish start dying

[Mandosh]

Originally Posted by mohammadali

the salinity show 1.024 at home
but at J&L said the salinity is 1.028

What are you using at home to test your salinity? What was the kH reading the stores got from your water?

Honestly, you need to buy some test kits and learn how to test for parameters. It is kind of an important part of keeping a healthy tank. Especially when you're just starting out.