30 gallon mixing tank,
Add RO/DI water, bring to temp with heater, start mixing salt, bring to 1.025 or 35ppm using refractometer, let sit for 2 or 3 days while it aerates. I use a maxi jet 1200 and use the airline tube to shoot jets of bubbles for the aeration.
I then unplug the heater and use the same MH1200 to pump water to the main after draining whatever amount needed for a change, then replace the same amount after cheching temp, and salinity one more time.
Thomas