I keep mine at 1.026. I have had no problems or issues.
This is a silly question tho. If my SG is 1.026, wouldn't the other elements and minerals in my saltwater be a little higher(like calcium and magnesium)than say if I used a 1.024 SG?
That is why I use a little higher on the SG scale. JMO. But if I were running a larger system then say a 40-50g+ I think I would probably run my system a tad lower on the scale as with larger tanks you dose more so it would seem more realistic to run your SW at 1.024 SG(not due to cost either). In a smaller system, your WC water pretty much takes care of your calcium/mag/ replenishing of minerals.
Hard to say in all honesty. 1.024-1.026 seems to be the general rule for sure tho.