Man, that sucks... A few weeks ago I was mixing saltwater in my new 32 gallon rubbermaid garbage can, I put in the right amount of salt, and being exhausted with my new job went to bed, woke up, forgot I had added salt, and did the whole deal again. Needless to say when I tested SG the next day it was just SLIGHTLY high. I ended up using buckets and mixing the water with RO before actually doing the water change...