Sea salinities ?

[cyro]

Do u have any information about sea-ocean salinities? mostly tropical seas..

 

[Anonymous]

http://en.wikipedia.org/wiki/Salinity
Click on the map

Regards,
David Mohr

 

[cyro]

Thank you very much.
how can we convert PSU to our unit, sg. sorry for the question, i mean specific gravity values of the seas?

 

[Anonymous]

http://www.saltyzoo.com/SaltyCalcs/SgPptConv.php
Over-simplified but it will give you an idea.

Regards,
David Mohr

 

[cyro]

yes. thank you very much.

 

[blackcloudmedia]

So this is what I wonder, I know the salinity here in Northeast Florida is 33. Why on earth are we told to keep our reefs around 25. (Insert decimal where you will.)

 

[acroman]

because most of the things in you aquarium come from places with lower salinity. also, the lower salinity is bad for parasites.
I have kept mine at 35ppt (world average) for some time now, and i used to keep it at 45ppt (about what is found in the red sea).
most people I know keep it between 25 and 35 tho.

 

[Anonymous]

The lower the salinity, the cheaper the saltwater (every penny counts). Just need to take care of the Alk and Ca for the most parts.

 

[acroman]

unless you get natural seawater and evaporate it to get the salinity u want :lol:

 

[ChrisRD]

So this is what I wonder, I know the salinity here in Northeast Florida is 33. Why on earth are we told to keep our reefs around 25. (Insert decimal where you will.)

I've yet to see any hobby literature recommending a salinity of 25 for reef tanks. I think you might be confusing specific gravity and salinity. With SG = 1.025 your salinity is probably somewhere around 33 ppt but it depends on what temp you're running.

IMO there's no compelling reason to keep a reef tank at anything other than average seawater salinity levels (S=35) which is an SG of about 1.0264 at 77 degrees. For someone who's running a Red Sea biotope it might make more sense to run up around S=40.

 

[Anonymous]

good answer Chris, ya beat me to it.