I am over a year and the list is still so long. For the heck of it I filled another bucket with 5 gallons and added 2 cups of salt. The directions say a 1/2 cup per gallon and I still have about 3 tablespoons undissolved. I will check tomorrow and see the outcome. If that doesn't dissolve, I will try 1 cup per 5 gallons and see if I can get that to dissolve.
As far as not having everything - it is kind of the never ending quest for perfection that makes the hobby IMO. Maybe I will knock a wall out and build bigger - but first I will learn to make the water salty. Jay