Specific gravity reef tank

[chike87]

What do you guys keep your SG at. My LFS told me to keep my SG at 1.021. I have been doing this for several months now and tank seems to be doing well, except a few corals are not opening up fully. Just curious what everyone else is doing.

 

[gnashty]

I keep mine at 1.025 - 1.021 is a bit low in my opinion.

 

[stoney1118]

I keep mine a little high, 1.025-1.026

 

[porpoiseaquatics]

stoney1118;746228 wrote: I keep mine a little high, 1.025-1.026

+1. Corals will like it better.

 

[stoney1118]

gnashty;746226 wrote: I keep mine at 1.025 - 1.021 is a bit low in my opinion.

+1 that's really low for a reef tank IMO

 

[superclown]

I keep mine at 35ppt I think that comes in right at 1.026 using salinity

 

[dakota9]

I don't think you'll find much variation

1.026 is optimum

 

[raz0945]

1.021 is more of a fish only, if you have corals you might want to slowly bump it up with each water change. Holley

 

[schwaggs]

yep, what the others said 1.025-26

More important than the actual value you keep it at is an accurate, calibrated refractometer to measure it with.

 

[ralph atl]

SuperClown;746233 wrote: I keep mine at 35ppt I think that comes in right at 1.026 using salinity

:thumbs:

 

[gregoryleonard]

SuperClown;746233 wrote: I keep mine at 35ppt I think that comes in right at 1.026 using salinity

+3 or 4!!

 

[jeffmuse]

chike87;746223 wrote: What do you guys keep your SG at. My LFS told me to keep my SG at 1.021. I have been doing this for several months now and tank seems to be doing well, except a few corals are not opening up fully. Just curious what everyone else is doing.

Local fish stores have to maintain a tremendous volume of water, and in order to stay profitable tend to go with a lower SG in their tanks (salt costs money). Lower SG in the 1.021 range is fine, but I find my corals do better with a higher SG.

As with everything in this hoby, if you are going to raise SG, do it slowly. :thumbs:

 

[cr500_af]

+ eleventy billion. Anyone who told me to keep a reef tank at 1.021... well, I wouldn't ask them for reef advice.

 

[jennm]

Natural sea water *averages* 1.025.

I like 1.023-1.024 for a reef tank.

I concur that 1.021 is a bit low but it may not be your sole reason for corals not opening - I've seen plenty of good looking tanks with specific gravity on the low side.

What are the rest of your parameters?

Jenn

 

[rdnelson]

Keep mine at 1.024-1.025 and all is well.

 

[grouper therapy]

JennM;746351 wrote: Natural sea water *averages* 1.025.

I like 1.023-1.024 for a reef tank.

I concur that 1.021 is a bit low but it may not be your sole reason for corals not opening - I've seen plenty of good looking tanks with specific gravity on the low side.

What are the rest of your parameters?

Jenn

I have as well Jenn,anywhere from 1.020 on one system and 1.030 on another.
The super stable theory in regards temp and salinity that most subscribe to is not one that I agree with. I have changed my salinity several times as much as .004 in one water change without in visible effects. I have had my system swing 4 degrees in a 24 hr period without any visible effects. To each their own.

Edit: That said ,Severe ph and Alkalinity swings have had an adverse effect on my system.

 

[grouper therapy]

I think at times over the years some reef systems have had problems that were not easily discerned and the parameters mentioned were detected and thereby deemed the cause. I'm not advocating inducing these swings but I do believe that it would be much more advantageous to concentrate our efforts on keeping cleaner water. JMO

 

[tsellers]

I keep mine at 1.025

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