Ok went to the lfs.
Tested for
Nitrate
Nitrite
Ammonia
Copper
Phosphate
Calcium
Ph.
Ph and calcium levels where bang on.
No ammonia, nitrates or copper in the tank.
Slight levels of nitrite and phosphate.
Salinity was 1.027 tested with a refractometer.
Any thoughts, could it be the salinity?
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