Why do the tips burn?

[FishyFishy!]

Originally Posted by Reef-Geek

I am running out of AF reef salt and going back to IO, AF's dKH is about 8 and IO's is about 10. Should I be concerned with tip burning? How do people with IO and ULNS prevent tip burning, I don't want to work with muratic acid unless I have to.

Could you find coralife salt? Mine is usually around 8 - 8.4 when mixing new water.