Just a 5 gallon bucket with a small powerhead to mix the salt and water. If your tank environment is what it should be, any water added to the system will become oxygenated soon enough. In fact, with proper "water chaos" like a good protein skimmer and maybe some cascading out of the tank into the sump; there's probably no need to be concerned with oxygenating newly mixed saltwater before addition to the tank.
_________
90G. Kent Phos Reactor running carbon and PhosBan, Coral Life 225 Skimmer, Typhoon 5 Stage RO/DI, 20 Gal Sump/Refugium with Chaetomorpha lit opposite daylight cycle. Coralife 2x150MH+2x96W PC Actinics, Ecotech Vortech propeller pump, Hydor Koralia #3. |