$50 for the box of reef crystals at fins and skins seems to be the best price I have found in the area.
Drysdale has that for $38 I believe
I buy pre mixed (salt water) from FAOIS, I at one time mixed my own but found it easer to just buy it already made for what I need
I've been down that road before and I cannot honestly ever imagine going back to buying premade water or ro/di water from an LFS. Nothing against yourself or any of the stores but it's just a pain the rearend plus it's nice having saltwater on demand incase fit hits the shan.
It would could double what it's worth to drive to Lakeland though.
Reef Crystals delivered to your door. Dr's foster and smith for $53, free shipping and no sales tax. Takes a week + or - a day
Wish I had a good LFS to support! Its 50 min drive to a reputable LFS where im at!