Can I raise salinity from 33.3 - 34ppt in a day with w/c ?

[DE FISH]

Can I raise salinity from 33.3 to 34ppt in a day ? With a water change Mixed reef or will this cause issues ?

I hadn’t calibrated my Hanna salinity meter for a while and was shocked to find readings of 33.3 - 33.4ppt when recalibrated.

33.3ppt = 1.0251 sg
34ppt = 1.0256 sg

 

[jeffww]

Ive done 2 ppt and not noticed anything but I mostly have hardier acros. My opinion is that occasional rapid salinty changes are okay as long as the salinity is generally otherwise stable. Some corals experience much worse changes during tidal flows or rainstorms.

 

[MBruun]

You need to know the temprature of the water to determine the actual salinity.
Raising the salinity are best done by ATO

 

[jda]

Just replace evap with saltwater instead of fresh. It is probably going to be fine either way.

 

[DE FISH]

You need to know the temprature of the water to determine the actual salinity.
Raising the salinity are best done by ATO

temp is 25.5c - 78f the water change would match the temp of the tank

Ive done 2 ppt and not noticed anything but I mostly have hardier acros. My opinion is that occasional rapid salinty changes are okay as long as the salinity is generally otherwise stable. Some corals experience much worse changes during tidal flows or rainstorms.

Yeah going from 1.0251sg to 1.0256 does not seem a great increase at all

when you look at it in ppt 33.3 to 34 it looks more sinister seems to be a very small increase tbh

 

[DE FISH]

Just replace evap with saltwater instead of fresh. It is probably going to be fine either way.

For a 0.0005sg increase seems very long winded @vetteguy53081 any thoughts on this ?

 

[Randy Holmes-Farley]

Always raise salinity by replacing evaporated water with salt water. It forces you to go slow which is nearly always good.

Trying to do it by water change with hypersaline water is a waste of salt.

 

[DE FISH]

Always raise salinity by replacing evaporated water with salt water. It forces you to go slow which is nearly always good.

Trying to do it by water change with hypersaline water is a waste of salt.

Thanks Randy was waiting for you to chime in

 

[Beau_B]

Am I the only one who wouldn’t even notice that difference?

#closeiscloseenough

 

[DE FISH]

Am I the only one who wouldn’t even notice that difference?

#closeiscloseenough

I like precision and stability turns out when I recalibrated the meter I must not have rinsed the probe enough as I recalibrated the meter again just before the water change and it read 34ppt so in the end I didn’t have to change anything lol my bad

 

[SteveMM62Reef]

Saltyzoo dot com has a handy little calculator, for either raising or lowering salinity. With a suggested limit on the change.