Coral & Salinity

ericscicluna

ericscicluna

New Member
So, I had my aquarium running for a month cycle now and the parameters are all correct.

I bought corals (Torch & Frogspawn) and acclimated them into the tank.

The torch wasn't opening as it should so I did a salinity test and found out it was 1.018 which was not good.

I did a water change and increased the salinity to 1.025. The coral is still closed after a whole day.

Should I wait longer or it should have opened by now ?

Thanks
 
ericscicluna

ericscicluna

New Member
The salinity is now good and the torch coral is still closed. The torch is a new coral which I added recently... Maybe it's still stressed ?
 
flower

flower

Well-Known Member
Quote:
Originally Posted by ericscicluna http:///t/397066/coral-salinity#post_3538082
The salinity is now good and the torch coral is still closed. The torch is a new coral which I added recently... Maybe it's still stressed ?


Hi, Welcome to the site!

Your corals are fine...yes it's still very stressed and now more so since you increased the SG.

1.018 may not be optimal but it isn't bad either....the problem corals have is change. They don't do well to adjust, they are used to their environment being very stable...the same, day in and day out. The original move was bad, the acclimation was hard...then you kind re-acclimated it again when you upped the SG. None however should kill the coral since (I hope) it was done slowly. However, that's the reason it isn't opening. Some corals will take up to a week to bloom. The placement, and everything has to be just right for it to feel safe and happy...then it will open and be beautiful. So leave it alone and don't handle it...give it time to feel safe.
 
geridoc

geridoc

Well-Known Member
If the salinity is 1.025 then what is the specific gravity at?
The specific gravity is 1.025, and the corresponding salinity is 35 ppm.
 
flower

flower

Well-Known Member
LOL...Come on guys...the saltiness in the tank is the SG, we are not all professors.
 
geridoc

geridoc

Well-Known Member
LOL - I agree. Hobbyists always use specific gravity. I never see true salinity used except by lab people or field ecologists. But...he asked.
 
flower

flower

Well-Known Member
Just a note...a refractometer shows SG on one side ...example 1.025 and the other side of the scale is 35ppm...the hydrometer only shows SG, and most have a black or red area to show the "safe" zone the SG should be in.

As GeriDoc pointed out...When a new hobbyist says saltiness in the water, or salinity...99% of the time they do mean the SG.
 
2quills

2quills

Well-Known Member
Just a note...a refractometer shows SG on one side ...example 1.025 and the other side of the scale is 35ppm...the hydrometer only shows SG, and most have a black or red area to show the "safe" zone the SG should be in.
As GeriDoc pointed out...When a new hobbyist says saltiness in the water, or salinity...99% of the time they do mean the SG.
I respectfully disagree.
Specific Gravity is a measurement of density of air, gas or water for instance. Specific gravity of a reference material changes with temperature.
Saltiness is a much better referance for Salinity, IMO.
But you're right. We knew what the o.p. meant. Just doing my part to help. :)
 
silverado61

silverado61

Well-Known Member
As a newbie I started by saying specific gravity. Now, still a newbie, I say salinity. Easier for a guy like me to comprehend and understand.

Just saying.
 
2quills

2quills

Well-Known Member
As a newbie I started by saying specific gravity. Now, still a newbie, I say salinity. Easier for a guy like me to comprehend and understand.
Just saying.
I still catch myself mixing them up for time to time. No biggie. It's just that as a newbie I didn't know that specific gravity could change even if salinity stayed the same.
One could add a table spoon of sugar to a glass of water and change the specific gravity for instance.
If one somehow registered a low reading of specific gravity for some reason even though the salinity could be higher than what is thought and then boosted the S.G. to where they suspected it should be then it could make acclimation a little tougher. Salinity could turn out higher than recommended. Especially is the S.G of 1.025 is a little higher than generally recommended for certain species of coral. This is hypothetical ofcorse.
The question still remains about the necessary parameters for keeping corals in regards to the o.p.'s system.
 
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