Specific gravity too low for sps

[An ngo]

Does anyone know how to raise specific gravity up. I just check my in few day and noticed it pretty low for my coral (1.021-1.022). I would raise it up to 1.025. I try to do water change with sg 1.026 but my DT sg still stay at 1.022. What should i do to raise it. ??

 

[Daniel92481]

Hello, I would say let your water evaporate a bit. Remember, salt stays in while water evaporates, naturally raising your salinity. Hope this helps!

 

[Chris Wells]

I don't know how big your sump is, but I would overfill my sump with salt water and let the fresh water evaporate off...leaving higher Salinity. This way it is nice and slow.

 

[An ngo]

Hello, I would say let your water evaporate a bit. Remember, salt stays in while water evaporates, naturally raising your salinity. Hope this helps!

I left there 3 days and even do water change but seem like nothing change

 

[An ngo]

I don't know how big your sump is, but I would overfill my sump with salt water and let the fresh water evaporate off...leaving higher Salinity. This way it is nice and slow.

I have 1.5 HOB refugium. Should i overfill it by salt water ?

 

[Daniel92481]

I’m no expert here because bubba, but remember too that salinity fluctuates naturally even in the wild. Here’s a guide for you to reference.

 

[tgp4274]

when mine runs on the low side i turn my ato tank into salt mixed at 025 and just let my ato add to it slowly untill i get my DT where i want it

 

[Fudsey]

What are you using to check it? Refractometer? Do you calibrate it often? What do you use to calibrate it?

 

[An ngo]

when mine runs on the low side i turn my ato tank into salt mixed at 025 and just let my ato add to it slowly untill i get my DT where i want it

I may do that tho

 

[An ngo]

What are you using to check it? Refractometer? Do you calibrate it often? What do you use to calibrate it?

I use refractometer for measure it. My cousin use it with me and has no problem, i beleive it should work well

 

[tgp4274]

am actually doing it right now as bought a bunch of things at CMAS and my grav went to 023 accounta all the acamating and all my top off water went into the DT as was doing them..
when i get back up to 026 i'll change it back to RODI

 

[An ngo]

Cool, seem like using ATO would be a best Method for me

 

[tgp4274]

good luck
i have a 130 and if i mix my 5gal ato the 5gals will raise it about 1 point..
so from 023 to 024

 

[An ngo]

I also mix kalwasser in my ATO. If I mix salt water. Should I still use the same amount of kalwasser or less than that?

 

[tgp4274]

i would guess same..
tho not sure as i don't use kalk...
prob not as the salt will have cal in it
i would leave kalk out and watch cal while raiseing you gav

 

[An ngo]

i would guess same..
tho not sure as i don't use kalk...
prob not as the salt will have cal in it
i would leave kalk out and watch cal while raiseing you gav

Thanks for your help. I would that

 

[An ngo]

I heard someone mix salt with the small amount of water and dirextly dump into DT. Is that a good idea

 

[tgp4274]

uuummmm i don't think id make a slurry and dump it in......
if salts not full desolved and gets on corals would be a prob..
that and not wanting to raise it fast

 

[Randy Holmes-Farley Verified Community Expert]

I also mix kalwasser in my ATO. If I mix salt water. Should I still use the same amount of kalwasser or less than that?

You cannot mix them.

 

[tgp4274]

ah thanks randy
i wasn't sure but thought not