Ohhhh .. hmmm, man that sounds like a good rule of thumb.
Nuts to it all, I'm only halfway down on the salinity thing but I suppose that's far enough along that I'm committed to completing it since you have to take forever to bring the salinity back up. Guess next time I'll have a hospital tank ready to go that I can copper up.
Have I mentioned lately how crazy of a hobby I think this is? Stress if fun right? Argh. Honestly, knitting sounds pretty good right now.