Well my job for today fell through so I had the day to plumb in my mixing station and work on the vibration issue with the main return pump. Turned out some of the spa flex was a bit tight on my floor joist and the platform the pump was sitting on was resonating the vibration through everything. I had a chunk of 6" thick rigid styrofoam so sat the pump on that and shortened one length of spa flex and the vibration noise is now 90% gone
I plumbed in my original Laguna pump in between my RO/DI barrel and SW mixing barrel and plumbed it all into the main manifold for my reactors. I can now drain my sump by turning a valve and it goes directly into a drain. Then by opening a couple more valves and hitting a switch I can fill it back up from my SW mixing barrel. A couple more valves opened and closed and I can pump water from my RO/DI storage/top off barrel into my SW mixing barrel. Another couple valve turns and I can use the pump to recirculate the SW mixing barrel as I add the salt. Once it's all dissolved I turn the pump off and turn on my little Koralia 1040 I have in there to keep it moving.
In less than 10 min, I changed 30 gal in the DT, and mixed a new batch of SW. I never even got my hands wet
I'm totally stoked. Pictures to follow...