brackish water tank salinity

[prawn]

Hello,
I am in the process of preparing my brackish water tank. It will be mid to high end brackish (1.010-1.018) have not decided yet. My question is can evaporated sea salt be used as salt for aquariums. I understand that some minerals such as magnesium and calcium cannot re dissolve into water without the help of an acid. Could aquarium acidic buffer be used to dissolve them? Do i even need a special marine mix if it is only going to be a brackish tank? Excuse my ignorance, I'm only a teen and some terms have confused me regarding to the composition of marine salts. I am only curious as i have naturally evaporated sea salt on hand and was wondering how to fully dissolve it. I live close to the sea but carrying a 30litres of water every time i need a water change is laborious.
Thanks in advance,
Prawn

 

[Meyer Jordan]

From what I understand, products such as Instant Ocean Salt is what is commonly used.

 

[peter hillman]

The synthetic salts can be used for a brackish set up, just adjust the amount needed with S.G. Be advised 50gallons of salt mix will be close to $20. I'd try to find a way to bring seawater home if possible. Once I used a 100 quart ice chest to transfer water got about 18 gallons in it. A powerhead can be used to transfer it when you get home.