Bought the containers from here https://www.ruralking.com/ace-roto-mold-25-gallon-vertical-dome-top-tank-vt0025-18.html with free shipping.
Just thought it might give some ideas. It works perfect on my 200 gallon setup. I change out 20 gallons every other week. I have a drain coming from my sump and then I just use the hose from the mixing station to fill back up. All together it takes less than 10 minutes to do a 20 gallon change.
I also have a separate line running from my rodi storage to a float valve in the sump that keeps the water topped off.
Just thought it might give some ideas. It works perfect on my 200 gallon setup. I change out 20 gallons every other week. I have a drain coming from my sump and then I just use the hose from the mixing station to fill back up. All together it takes less than 10 minutes to do a 20 gallon change.
I also have a separate line running from my rodi storage to a float valve in the sump that keeps the water topped off.