I always used an MJ1200 with a Sureflow mod. Probably more than I really needed for aeration, but it worked very well to mix the salt. Plus, I didn't bother running it 24/7. From what I understand (as well as my own experience), unless the salt contains organic material (for instance, I believe Reef Crystals does), you really don't need to keep it aerated. If we're talking fresh water, this definitely is not necessary.