DIY Automated salt water mixing system

[sphelps]

For what it's worth the last system I used the saturated approach I outline before had a 29 gallon tank for the salt tank, with the overflow installed it probably only held just over 20 gallons of water. I use to fill it with a full box of reefers best salt. So 20 kgs of salt to 20 gallons of water, never had a precipitation issue.