Help salinity

[ivanj]

Hi I have a lido 120 with 95-100 liters of water. I only have a float hydrometer and I think maybe it is not accurate.
My ricordea yumas is sweating ( they shrink and loose color ) and I would like to know if my salinity is way to high, recently I have added ekstra salt ( maybe to much ? ).

I have used a coinweight to measure the same quantity of tapwater and saltwater and the difference is 3,27 % is that the same as 1.0327 ( preferred 1.025 ) ?

If I have to much salt in my aquarium how much water do I need to replace ?

Ivan

 

[Psyops]

Get a good refractometer either from online sources or from your LFS. If your corals are suffering and you need a quick adjustment, then go to your LFS and get one. Don't adjust too fast. For instance, in one day. Do it over a week or so. Do a 10-20% water change with 1.020 saltwater every few days. Also depends what type of corals you have. Hope this helps.

Alex

 

[ivanj]

Can you tell me if my salinity is too high it weighes 3,27 % more than tapwater .
I know I should get a refractiometer but it take a few days before I get it.
My ricordea florida, zoas, discosoma, caulastrea looks normal .
I have 2 different euphylia and they look ok ( one of them may be a little smaller than normal )

Ivan

 

[disc1]

Can you tell me if my salinity is too high it weighes 3,27 % more than tapwater .
I know I should get a refractiometer but it take a few days before I get it.
My ricordea florida, zoas, discosoma, caulastrea looks normal .
I have 2 different euphylia and they look ok ( one of them may be a little smaller than normal )

Ivan

At what temperature exactly? That is really important.

You would have to compare to RODI water. Tap ain't gonna cut it here because we don't know the specific gravity of your tap water. It is NOT 1.000. And it has to be exactly the same temp as the saltwater you are trying to compare to. Exactly exactly the same temp.

How did you measure the volumes? They have to be exactly exact to do this type of thing. Would be a LOT easier to either calibrate your hydrometer or get a refractometer.

Randy has an article on making a DIY calibrant if you want to check it. I do remember the formula for the one for refractometers, but I don't remember exactly the formula for doing hydrometers. But it is in the same article.

 

[ivanj]

This is a lot more complicated than I imagined ( I have read a little on the internet )
I have a coinweight, a small testtube/glass which I weighed before it was filled with water to the rim.
the tapwater weighed 51,97 gram ( 18-19 degrees celcius, I had not used the tap for a while )
tankwater weighed 53,67 gram ( 25 degree celcius
I have to get my hydrometer calibrated, maybe my local fishstore can see how much it is off and put a piece of colored tape on it as a reference ?

Ivan

 

[disc1]

Your on the right track conceptually, but in practice there are a lot of tricky details. Not really a practical way to determine salinity although it is theoretically sound.

 

[ivanj]

Thanks all