Salinity question

[jtroutine]

Okay if I add like a gallon of ro water for top off at once, for like a 60 gallon system, is that too much change in salinity, I add it slowly in the sump.

 

[a&m aggie 04']

shouldnt hurt anything. i lose at least a gallon a day, and add when i see it needs it. I dont see much of a change after the topoff.
Mark