How to automatic mixing water

[sphelps]

I don't think it's reasonable to assume most can store 200 gallons of water, I've seen a 200 gallon poly tank and it's big and I can't see many people finding a convenient location for it. Some would even have trouble getting it inside.

Also 2 pumps could work and do work, most use dosing pumps which yes cost more than typical pumps but don't forget a controller with programmable logic and salinity control will run for at least $1000 so it's certainly not a cheaper option but I would agree it's a better one.