Specific gravity

[larrysaltisfun]

So I just discovered that the specific gravity of my tank is 1.027 and the water I’ve been getting from my LFS which I thought was 1.024 is really at 1.028. my leather coral and cespitularia have been looking kind of peaked lately slumped over.
LPS and Zoas look good .

Two questions: can I safely bring the specific gravity down to 1.026 with one 10% water change without adversely, affecting corals and

do you think this could have caused the sudden irritation in my softies?

 

[JTP424]

I do not believe this is what caused irritation to your corals. IMO a swing of .001 will not impact a coral THAT greatly (I could be wrong, I've been wrong before) I would investigate other issues, softies can be dramatic.

 

[Ziggy17]

So I just discovered that the specific gravity of my tank is 1.027 and the water I’ve been getting from my LFS which I thought was 1.024 is really at 1.028. my leather coral and cespitularia have been looking kind of peaked lately slumped over.
LPS and Zoas look good .

Two questions: can I safely bring the specific gravity down to 1.026 with one 10% water change without adversely, affecting corals and

do you think this could have caused the sudden irritation in my softies?

I think you’re asking can you safely bring in down from 1.026 from .027 in one shot? IMO yes. I’ve done it with SPS in the tank with no ill effects. Slower the better though.
Can you do it with a 10% WC, will depend on the size of tank.
I’ve had ATO issues in the past where I’d see shifts of .01 in my smaller tank. Nothing died.

 

[larrysaltisfun]

So I just discovered that the specific gravity of my tank is 1.027 and the water I’ve been getting from my LFS which I thought was 1.024 is really at 1.028. my leather coral and cespitularia have been looking kind of peaked lately slumped over.
LPS and Zoas look good .

Two questions: can I safely bring the specific gravity down to 1.026 with one 10% water change without adversely, affecting corals and

do you think this could have caused the sudden irritation in my softies?

I think you’re asking can you safely bring in down from 1.026 from .027 in one shot, IMO yes. I’ve done it with SPS in the tank with no ill effects. Slower the better though.
Can you do it with a 10% WC, will depend on the size of tank.
I’ve had ATO issues in the past where I’d see shifts of .01 in my smaller tank. Nothing died.

Yes, that’s exactly what I was asking. I could do it with a 10% water change. I just wanted to make sure that doing it in one fell swoop would be safe thank you.

 

[Mr. Mojo Rising]

Personally I would slowly remove a cup of saltwater and replace with rodi until you get to where you want to be. I would not say this is why only 2 corals are upset, to me its not a big deal.

 

[larrysaltisfun]

I do not believe this is what caused irritation to your corals. IMO a swing of .001 will not impact a coral THAT greatly (I could be wrong, I've been wrong before) I would investigate other issues, softies can be dramatic.

Yeah, the leather coral is huge relative to the size of everything else. I have a feeling it polluted my water when I moved it, and that might have caused the irritation to my other softies.

 

[JTP424]

Yeah, the leather coral is huge relative to the size of everything else. I have a feeling it polluted my water when I moved it, and that might have caused the irritation to my other softies.

Could be! Or if something brushed up against the other corals etc. I did an algae clean on a tank and my Kenya trees decided they where going to be emo for several days.

 

[larrysaltisfun]

lol thanks for responding!

 

[Randy Holmes-Farley Verified Community Expert]

So I just discovered that the specific gravity of my tank is 1.027 and the water I’ve been getting from my LFS which I thought was 1.024 is really at 1.028. my leather coral and cespitularia have been looking kind of peaked lately slumped over.
LPS and Zoas look good .

Two questions: can I safely bring the specific gravity down to 1.026 with one 10% water change without adversely, affecting corals and

do you think this could have caused the sudden irritation in my softies?

An accurate sg of 1.027 is fine. I’d lower it slowly if you want it lower. There is no urgency.

 

[larrysaltisfun]

So I just discovered that the specific gravity of my tank is 1.027 and the water I’ve been getting from my LFS which I thought was 1.024 is really at 1.028. my leather coral and cespitularia have been looking kind of peaked lately slumped over.
LPS and Zoas look good .

Two questions: can I safely bring the specific gravity down to 1.026 with one 10% water change without adversely, affecting corals and

do you think this could have caused the sudden irritation in my softies?

An accurate sg of 1.027 is fine. I’d lower it slowly if you want it lower. There is no urgency.

Thank you, Randy

 

[Ziggy17]

Personally I would slowly remove a cup of saltwater and replace with rodi until you get to where you want to be. I would not say this is why only 2 corals are upset, to me its not a big deal.

This.

Way easier than mixing a WC at 1.025 and hoping you land at .026.

 

[larrysaltisfun]

Personally I would slowly remove a cup of saltwater and replace with rodi until you get to where you want to be. I would not say this is why only 2 corals are upset, to me its not a big deal.

Will do!

 

[get-salty]

Im with Mr. Mojo as well.

From .027 to .026 is super easy simply by taking out the saltwater ( X amount ) and let the ATO refill with RO.
No need for a WC.

Give it say.. an hour then take a reading

 

[KStatefan]

Remove 3.7% to be replaced with RODI is what it would take to reduce S.G, from 1.027 to 1.026