I have two 13gal. Garbage cans. One I fill with RO/DI water then mix in my salt. I have a mixing pump in that container. It also has a hose off one side with a valve. The hose is T'd so that it bypasses water while I have the valve in the closed position and the pump on. (I leave the hose off the pump while mixing)
Then I have the other can marked to where the float shuts the water off in the mixing can. This ensures I replace exactly what I take out. No guess work, no worries about Salinity.
I have a pump that stays in my sump. I hook a hose to that, and turn that switch on pumping water into the waste can. Once it's at the marked spot on the can. I turn that pump off.
I then turn the pump on the fresh Mix, pumping that new water back into the sump. Turn my main pump back on.
All finished, no spills, takes me about 15mins to do a 10gal water change.
I dump the waste water in areas where I have Pine Straw to keep weeds at bay. I then rinse both cans, wipe them off, and put them back in their places. The waste can sets in the garage, the mix can goes back in the laundry room and gets hooked back up to the water supply hose.
Works for me!
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