Proper ppt for reef tank at 78 degrees?

I am setting up a SW tank in a week or two and was wondering whats the proper ppt reading I should have on my refactometer if my water is 78 degrees

 

I was a tad confused, I figured it out now.

 

People will vary in their response. I have no ATO so in my sump, I drew a low line, a water line, and a high line. At the water line, I keep 1.025. at its lowest, it will be 1.027 and at the high line, it will be 1.024. I pour my top off water when it is at the low line and fill it to the high line. Sort of a way to maintain consistency without an ATO. probably more than you were asking. haha