SaraB
Coral Killer
I use my rubbermaid 32 Gal trash can with 20 gallons of RO water and mix it with my extra Rio 2100. Since it's mixed with the crappy Rio, I actually do a taste test before adding to the sump to make sure the pump didn't blow oil, etc. I heat the water and mix with salt for at least 24 hours in advance of the water change.