Hello, my salinity has been a little low recently (32ppt) so I decided to mix 1/2 cup extra salt mix into 5 gallons of RO water. I measured the salinity this morning, and it's 54ppt! Is it a bad idea to add some of this to my system to bring the salinity back up to 35ppt? If it's okay, how much should I add? 1 gallon? 1/2 gallon?