No, but my water osmosing right now and was planning doing this... (When water reach 25-27C°)
I put RODI
in a container with a 600GPH powerhead and a heater to reach the 27C°. Then I pour the salt, wait... Usually I wait until water reach 27C° before starting to pour it into the aquarium over 1-3 hours period with little 1 gallons containers.
Probably 1 - 1.5 hours then... Can I test the tank after all the new water is in ?
I plan to change 4 gallons of the 20g, there's diatoms on my rocks and sand since I changed my rock placements...