can you see a difference in 1.023 to 1.025 just by looking at your corals?

[Gary Majchrzak]

*have you ever noticed*

within their average tolerable range (SG 1.023 - 1.025 for example) have you ever noticed any differences in the appearance of your corals?

If so, what difference(s) do you notice?

this is NOT a trick question!

 

[fishypets]

Good question Gary. Recently my SG was @ 1.028 which killed fish and stressed the colors/growth on my acros. Did a 15 gallon water change with fresh ro/di water and things started looking better within a few days.

Do your acros look better at 1.023 or 1.025?

 

[Gary Majchrzak]

Do your acros look better at 1.023 or 1.025?

I don't want to influence/skew what others say

sorry to hear about your losses

 

[Dmorty217]

This is a good question to those out there, would also like to hear what salt you are using at what SG for the best results. I would like to see what people's experiences with different salts at different SG has yielded

 

[Gary Majchrzak]

This is a good question to those out there, would also like to hear what salt you are using at what SG for the best results. I would like to see what people's experiences with different salts at different SG has yielded

I don't want to complicate this. Let's hear about different salt blends in a different thread.

THANKS

 

[Genetics]

Gary, great question to discuss. I think it's well established that people's visual capabilities are well below what we think they should be from studies in other fields.

 

[lowfi]

Recently my SG was @ 1.028 which killed fish and stressed the colors/growth on my acros

I am sorry about your fish loss, but it is very hard for me to believe that an increase salinity of ~2ppt would kill your fish. I am guessing you are having other issues that are killing your fish.

I do believe that prolonged exposure to salinity extremes can effect Acro coloration/growth. I don't believe we can visually tell the difference when our salinities fluctuate by levels as little as 1ppt. Interesting question Gary.

 

[fishypets]

I am sorry about your fish loss, but it is very hard for me to believe that an increase salinity of ~2ppt would kill your fish. I am guessing you are having other issues that are killing your fish.

I do believe that prolonged exposure to salinity extremes can effect Acro coloration/growth. I don't believe we can visually tell the difference when our salinities fluctuate by levels as little as 1ppt. Interesting question Gary.

The s.g. was @ that level for 2 months or more. I'm more than sure that's what killed the fish. Toward the end of high salinity issue one of my deep waters started to STN. As soon as the SG was lowered the STN stopped.

 

[Denadai]

Impossible

 

[jackson6745]

Impossible

What is impossible?

 

[mr.maroonsalty]

Probably that lower than Red Sea sg killed the fish.

What are we talking about a <4-8% difference? Im curious what people think too.

 

[fishypets]

The nay sayers here should raise ths S.G. to 1.028 for a few months and report back with pictures to prove no ill effects.

 

[phenom5]

Don't know. I keep my salinity pretty steady @ 35ppt. If anything, it goes up a little if I forget to fill my ATO reservoir. I'm not sure what my corals would look if my salinity went lower...

 

[ksicard]

my SG is usually 1.026, I accidentally put to much saltwater back in after a WC and my SG was at 1.029 for the past 3 1/2 weeks and had absolutely no affect on my fish or corals. I do have delicate species of fish and corals ranging from purple queen anthias, blue spotted jawfish, powder blue tang, and various SPS and what not. Other than raising my ca/mg/dkh higher than usual I saw no ill affects that I could tell by my eye. My LPS sulked for about 12 hours then puffed right back up, and strange enough but my LPS usually tell me if something is wrong before anything else. There could be more serious affects in long term elevated salinity but I highly doubt 1.028 killed your fish.

 

[sirreal63]

I wish I could say that I could, but I cannot.

 

[CHSUB]

back in the 1990's most people, including myself, ran SG @ 1.021.....

 

[Drae]

I think 1.025 is better imho and experiences but the only difference I've noticed is coraline algae growth is better at 24 to 26

 

[tdb320reef]

Reading

Reading

I don't look at Specific Gravity but rather PPT and always shoot for 35 on my Hanna digital refractometer.

 

[Gary Majchrzak]

back in the 1990's most people, including myself, ran SG @ 1.021.....

yeah. And 75F. And we wondered why so many SPS died!

 

[Froggy]

I personally have noticed a huge improvement running 1.025-1.026 instead of the1.023 I used to aim for. It could be a combination of things but higher SG/salinity is one of the variables that seems to have improved my tank. My SPS were pale and lacked much color. I get much better coloration personally at the higher salinity.

Joe