Raising salinity

[scotty333]

Guys,
Salinity’s a little low at 1.024 , 400 litres
I’m going to raise it using nsw instead of rodi

Any guesses how much it’ll take to raise .001-.002 to 1.025-26

 

[Mr. Mojo Rising]

Just let the water evaporate on its own, the salinity will gradually increase. It will get to 1.025 by tomorrow on its own.

 

[KStatefan]

Guys,
Salinity’s a little low at 1.024 , 400 litres
I’m going to raise it using nsw instead of rodi

Any guesses how much it’ll take to raise .001-.002 to 1.025-26

Use one of the calculators that Hamza's reef has no need to guess.

 

[JayM]

Guys,
Salinity’s a little low at 1.024 , 400 litres
I’m going to raise it using nsw instead of rodi

Any guesses how much it’ll take to raise .001-.002 to 1.025-26

I would just stop topping off evaporation until salinity is where you want it, then bring water level up with RODI.

 

[Randy Holmes-Farley Verified Community Expert]

To go from sg = 1.024 to sg = 1.026, it will take 7.7% of the water to evaporate and be replaced by 1.026 seawater.

 

[scotty333]

To go from sg = 1.024 to sg = 1.026, it will take 7.7% of the water to evaporate and be replaced by 1.026 seawater.

That’s what I’m looking for , some maths not guesses lol

So the replacement nsw is 1.025 so if I go to 1.026 I’ll need 15.4% in 400 ltr so 60 ltr?
Probably better to add a little then each day

So, new question boss if you don’t mind
How much salt to raise 2 points?

 

[scotty333]

Use one of the calculators that Hamza's reef has no need to guess.

No need to guess when the boss gets involved haha

 

[Randy Holmes-Farley Verified Community Expert]

That’s what I’m looking for , some maths not guesses lol

So the replacement nsw is 1.025 so if I go to 1.026 I’ll need 15.4% in 400 ltr so 60 ltr?
Probably better to add a little then each day

So, new question boss if you don’t mind
How much salt to raise 2 points?

No, that's not correct. Small changes in the salinity used hardly matter in this context.


Think of it this way.

Start at 1.024, and allow 7.7% of the water to evaporate, so the sg rises to 24/(1-0.077) = 24/0.923 = 26 --> 1.0260

If you then mix 92.3% 1.026 with 7.7% 1.025, the sg becomes 1.02592.

So still go with ~7.7%.

 

[scotty333]

Ok but I can’t lower my water level cos my skimmers set and lowering 1-2” will affect it hense the addition of salt tactic

 

[scotty333]

I’m guessing from past experiences of raising with salt about half a kilo

 

[Randy Holmes-Farley Verified Community Expert]

Ok but I can’t lower my water level cos my skimmers set and lowering 1-2” will affect it hense the addition of salt tactic

It's just a way of thinking of it. The answer is nearly the same done in daily increments of 1% evaporation.

 

[scotty333]

It's just a way of thinking of it. The answer is nearly the same done in daily increments of 1% evaporation.

I get ya cheers

 

[scotty333]

Lfs checked at 1.025 so alls good