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.

i will buy a test kit when i can
at the store they said its just high everything
the water condition is like a new tank set up
im using a "redsea hydrometer " to check my salinity and temp "

How old is the tank?

9 months old and it was running before i bought it

Hydrometers are usually inaccurate. They tested salinity with a refractometer at J&L. 1.028 is quite high. Should aim for 1.024-1.026.

If you need one, I have a spare Brand New Refractometer I'm selling for $35. I knew a local reefer who completely wiped out her tank because her 4 hydrometers were all off and by the time she checked with my refractometer, her tank's salinity was 1.012 or brackish.

Ugh... that sucks. It's also a mistake I've made. I let my little guy play with the refractometer a few times and forgot to check calibration of it after. It was quite low, reading 1.019 when it should have been 1.026. Luckily everything was okay but I let it go on for far longer than I should have. Hopefully that's the worst mistake I make with this hobby...

here is couple pics of my water change
http://s1053.photobucket.com/albums/s464/alexafg/

and i use this to check my salinity and temp
http://www.jlaquatics.com/product/mc...ermometer.html

you need a refractometer, those hydrometers are junk

str8 up , it is junk ill get my refractometer soon :)