Salinity calculator

ElTigreBlanco · Mar 25, 2018

Hello everyone. My salinity is low. 1.021 due to a bad hydrometer. I'm trying to raise my salinity to 1.023 today and then 1.025 in a couple days. I'm going to do a 5 gallon water change today. I have a biocube 32. Can anyone tell me the formula, or if there is a calculator to figure out what the salinity of the 5 gallons I replace today needs to be to reach 1.023 . Thanks ahead of time.

Randy Holmes-Farley · Mar 25, 2018

It's not usually practical to reach it by water change.

Top off for evaporated water with seawater until you get to the salinity target.

in your case, you'll need to add about 10% of the water volume to go up 1.021 to 1.023 and another 10% 1.023 to 1.025.

ElTigreBlanco · Mar 25, 2018

Randy Holmes-Farley said:
It's not usually practical to reach it by water change.

Top off for evaporated water with seawater until you get to the salinity target.

in your case, you'll need to add about 10% of the water volume to go up 1.021 to 1.023 and another 10% 1.023 to 1.025.

Excuse my ignorance as I'm new to the hobby. I figured if I was doing a water change and replaced 5 gallons of 1.021 water with say 1.027 I would be able to raise the total salinity to 1.023. I don't get much evaporation with the biocube

Randy Holmes-Farley · Mar 25, 2018

ElTigreBlanco said:
Excuse my ignorance as I'm new to the hobby. I figured if I was doing a water change and replaced 5 gallons of 1.021 water with say 1.027 I would be able to raise the total salinity to 1.023. I don't get much evaporation with the biocube

I don't know the water volume of your system, but you never want to raise salinity fast, and replacing evaporated water with salt water is almost universally the optimal recommendation.

To get from 1.021 to 1.023 using new 1.027 salt water, you'd need to change about 67% of the water volume.

ElTigreBlanco · Mar 25, 2018

I have a 32 gallon system. I do appreciate all your help, but what if I barely have any evaporation?

ElTigreBlanco · Mar 25, 2018

ElTigreBlanco said:
Hello everyone. My salinity is low. 1.021 due to a bad hydrometer. I'm trying to raise my salinity to 1.023 today and then 1.025 in a couple days. I'm going to do a 5 gallon water change today. I have a biocube 32. Can anyone tell me the formula, or if there is a calculator to figure out what the salinity of the 5 gallons I replace today needs to be to reach 1.023 . Thanks ahead of time.

I found a calculator. Thanks for the help though Randy