I think we may have hit on something. I had only a small amount of ro
in that tub. I put enough RC in for the amount of water I was planning on making and then let it fill up. Maybe next time I will let the tub fill up and then slowly add the salt....
I found an article
this morning that explains exactly what I think happened. Under the title "How to Mix Artificial Seawater" the author gave an explanation of what I think happened: "Adding the salt before the water can be okay, but causes an unusually high salinity for the period when you are adding water, which can result in the formation of certain precipitates that may be hard to redissolve."
I mixed up a sample batch this morning by starting with the total amount of water and adding an appropriate amount of salt mix. Everything dissolved and left no cloudiness. For now I will say Problem Solved.
As far as pH goes, after a night of aeration the pH is still around 7.7. What should my target pH be and how should I get it there?