Not much, you might try Black mangrove or some of the more upland less salt tolerant types. They grow faster and are easier in many ways to care for.

I've grown a number of the Reds in my window sill in pots without drain holes in saturated water and I always added some salt here and there. TYhey grow fairly well and make a nice house plant if they get good light.

Regards,
Tom Barr