I am working with a museum that houses, among other things, northern diamondback terrapins. I will be preforming maintenance on their tank, and that will require me to raise the water level and achieve a specific salt gravity.
I am estimating the tank at 35-40 gallons, but I will take the measurements and do the math the next time I am there (Monday) to be sure. For this species, I want a salt gravity of 1.014. It has been recommended that I use "rock salt" to do this. My question is, to achieve the salt gravity I want, what would be the salt:water ratio? For example, "X teaspoons (or tablespoons) per X amount of gallons" is what I am looking for so that I can do this right.
Thanks for your insight!