Changed 45 gallons of old water with 45 gallons of new salt water in 8 minutes with no runs, no drips and no errors. System works like a champ. Water changes will not be a pain anymore.
This setup works great for me but not everyone has a sump in the basement and a sink close by. Gravity is my best friend in this setup. The picture shows a 45 gallon tank above the sump in the basement. I have a separate pump that runs the 2 carbon filters and the UV sterilizer and it pumps water to this tank on a continuous basis and it overflows back into the sump. So this water is just part of the entire system. When I close of the valve you see at the far right (look below the head of the lamp), it shuts off flow to the 45 gallon tank. I then open the black valve you see at the bottom of the 45 gallon tank. That water goes right to the sink and it empties the tank in about 4 minutes.
At the very bottom left of the picture is a 55 gallon plastic barrel with a mag 3 pump in it. I pre mix the salt water and flip a switch and the mag pumps water back into the 45 tank via that hard pvc pipe you see going into the top of the 45. This takes another 4 minutes and I am done.
A nice benefit of this is that the new water is added very slowly into the system so there is no big change.
This works great for me. I hope you can use some of the ideas.
<fieldset class="gc-fieldset">
<legend> Attached files </legend>