1.66 lbs of salt to increase salinity from 1.0245 to 1.0255 ?

[Idech]

I need to increase my salinity and directly adding salt in a bit of water, slowly, would be the easiest.

I used a calculator and according to it I should add 1.66 lbs of salt for 120 gallons ? Does that make sense ? Temperature is 25.5 C.

Direct Salt Addition Calculator

Aquarium calculator; Estimate the amount of solid salt required to raise salinity to a target level.

www.hamzasreef.com

 

[Rjukan]

Idk the answer to your question, but when my salinity dropped to 1.023 I replaced my ATO water with saltwater and raised it slowly like that over a few days. Was pretty easy and my zoas are showing a lot of improvement.

 

[Randy Holmes-Farley]

I agree that the best plan is to replace evaporated water with salt water until you reach the target.

For the calculator, you have to assume a moisture level in the salt mix which you likely do not know, but it is ok for a rough calculation.

 

[beamers]

ATO method will be the smoothest. Just mix up that extra 1.66 lbs ( which sounds correct, also checked a calculator ) into your ATO and monitor it after its finished topping off in a few days. Such a crazy PH shock when you mix it directly into a sump or dump it in using buckets.

 

[kzenoni]

Agreed, ATO filled with saltwater works great on my 350 . Changes slowly so doesn’t effect my corals.

 

[BubblesandSqueak]

I agree that the best plan is to replace evaporated water with salt water until you reach the target.

For the calculator, you have to assume a moisture level in the salt mix which you likely do not know, but it is ok for a rough calculation.

Just curious, why not just turning off the ATO then manually top off with 1.0255 salt water? you'd have to remove the salt water from the ATO reservoir later and replace with RODI. is normal evaporation too fast?

 

[Randy Holmes-Farley]

Just curious, why not just turning off the ATO then manually top off with 1.0255 salt water? you'd have to remove the salt water from the ATO reservoir later and replace with RODI. is normal evaporation too fast?

If you want to do it manually that’s certainly fine. You do not need to replace small amounts of residual salt water in the ATO.

 

[beamers]

If you dose magnesium sulfate your levels will rise gradually anyways. Not sure if you do.

 

[Randy Holmes-Farley]

If you dose magnesium sulfate your levels will rise gradually anyways. Not sure if you do.

That’s certainly true, but it is true of many additives. Is there a reason you suggested that one?