So I found a retailer with the Crystal Sea marine mix, but the shipping is cost prohibitive. $80 for two boxes of 150 gal mix.
I used Instant Ocean before and had no problems. I kept up with water changes regularly and used RO water.
The family that I'm buying the tank from uses the crystal sea brand, but rarely mixes salt. They explained that between the P/S that's rated for a 500 gal tank and the refugium, they never have a problem with nitrates and just don't do water changes because they don't have to.
I mean, sounds awesome, but I want to be prepared in case I need to or there's an emergency. In any case, when I move the tank, they won't keep all the water so i have to mix some SW. Think I'll be okay with IO Reef Crystals?