I run the JBJ unit with an aqualifter on this tank. For top-off water ALWAYS use fresh RO/DI water. The only time you should ever pour saltwater in your tank is during water changes. I have had this unit for about 3 years, and it works very well. I was just too lazy to put it together when I set this tank back up (that was in August) LOL.
Due to how slow the aqualifter pumps water, I did change the timing interval for how long the pump is allowed to run. Also I took a screw driver and destroyed the alarm that sounds when the pump is running. Annoyed the hell out of me