I have a 10 gallon. I do 10% WC
per week. I use RO
water that I get from the store. I use Instant Ocean salt mix. I mix my water in a bucket by hand. I make about 3 gallons at a time. I mix to 1.025 SG
. I do not have an extra power head and heater to use for mixing water. The mixed water usually sits for at least 4-5 days before I use it. I don't normally think to stir it every couple of days, but there was a time when I first started mixing that I did do that. I had the same issue that I describe below when I did stir it.
When I go to use my water it still has undissolved salt in it. I test and the SG
is the same before and after I stir it up again, so I use it (I have no choice, really). But it bothers me that the salt does not dissolve all the way after that amount of time and it is going into the tank that way.