What not to do

[Walkerrobin]

I buy my salt and RO water from my LFS, salt always goes in the big container and the RO for top off in the little one. Today I did my PWC using the big container as usual and after did my tests to find my salinity really low, the LFS had put the water the wrong way around. Lesson learnt: never assume the store is right and check your water before you stick it in your tank.....!