Fay Posted January 17, 2005 Report Share Posted January 17, 2005 Also, LTA's prefer a salinity around 1.025, lower is not so good for them O.K. I have always keep my Specific Gravity at 1.022 to 1.023. Red Sea Salt Mix instructions says; Add water and stir until the Specific Gravity reading is 1.023 at 23C (S.G should be lower at higher temperatures) So why is everyone keeping their tanks at 1.025?????????????? Quote Link to comment Share on other sites More sharing options...
Brianemone Posted January 17, 2005 Report Share Posted January 17, 2005 ive always been told that 1.025 is the right SP because thats what it is in the ocean (call me a sheep ) i've never looked into it because it was a general concensus Quote Link to comment Share on other sites More sharing options...
chimera Posted January 17, 2005 Report Share Posted January 17, 2005 as brian says, because that is the SG (or essentially the concentration of disolved salts) of seawater. Quote Link to comment Share on other sites More sharing options...
lduncan Posted January 17, 2005 Report Share Posted January 17, 2005 Why 1.025? Because that has been determined as an average salinity across many reefs. Salinity ranges from 1.017 to 1.030 on low salinity reefs, giving an average of 1.025 And on High salinity reefs it ranges from 1.023 to 1.031, giving an average of 1.026 Quote Link to comment Share on other sites More sharing options...
RnB Posted January 17, 2005 Report Share Posted January 17, 2005 i take out a contaner of tankwater every so often during a change, put it aside with the fresh seawater in another cont, and when temps are the same check my SG with hydrometer....... no real calibration problems that way....... Quote Link to comment Share on other sites More sharing options...
chimera Posted January 17, 2005 Report Share Posted January 17, 2005 As Layton says, the salinity of sea water varies from one location to another. For instance, neither the Red Sea nor the Mediterranean is tidal and both have a high evaporation rate, therefore they are more saline than the open ocean. The Western Atlantic Ocean around the Caribbean also has a high salinity. The Dead Sea, of course, has the highest salinity of any sea in the world and no fishes can live there at all Quote Link to comment Share on other sites More sharing options...
Pies Posted January 17, 2005 Report Share Posted January 17, 2005 Layton is right .025 is the 'mean average' not nessessarly correct value. Lots of polls on RC etc with people typically ranging from .022 - .028. There is a 'conspiracy theory' that many run theirs lower (.022) because they use salt mix and it uses less salt and thus saves money. I run .025, am going with the 'average crowd' on this one. As stated the ocean SG changes depending on location, time of year, proximity to land, temprature and depth. Stability is probably more important than the actual value you choose. good luck Pie Quote Link to comment Share on other sites More sharing options...
lduncan Posted January 17, 2005 Report Share Posted January 17, 2005 As stated the ocean SG changes depending on location, time of year, proximity to land, temprature and depth. Probably time of day too. Quote Link to comment Share on other sites More sharing options...
Fay Posted January 17, 2005 Author Report Share Posted January 17, 2005 Thanks for that have put up mine to 1.025 over the last two days Quote Link to comment Share on other sites More sharing options...
wasp Posted January 17, 2005 Report Share Posted January 17, 2005 As it relates to anemones, BTA's will be OK with a salinity in the lower ranges. The other anemones will do better around 1.025. This is not to say there may not be some strains will tolerate lower salinities. But as a general rule with anemones 1.025 is best. Quote Link to comment Share on other sites More sharing options...
cracker Posted January 17, 2005 Report Share Posted January 17, 2005 Very interesting. Fay my new BTA from you has been good at .24. I have adjusted to .25 and LTA seems to be responding. Then again your LTA has been fine at .23??? WHO KNOWS!! :lol: Quote Link to comment Share on other sites More sharing options...
cracker Posted January 17, 2005 Report Share Posted January 17, 2005 Waitemata harbour NSW is .25 so I'm gonna follow suit. Quote Link to comment Share on other sites More sharing options...
cracker Posted January 18, 2005 Report Share Posted January 18, 2005 I have just noticed a massive difference in all of my inhabitants changing from 24 to 25. I think it may make a difference. Everything has spread out to maximum sizes and looks awesome! (Except for my LTA) who is slowly recovering from that damn melafix. (It is looking better though) Quote Link to comment Share on other sites More sharing options...
suphew Posted January 18, 2005 Report Share Posted January 18, 2005 What are you guys using to check your SG? I have one of those cheap floating things and my SG always seemed a bit on the high side (.026 - .27), Pies checked it with fancy light meter thing and found it was spot on 1.025. Really just a warning incase you are assuming your meter is right. Quote Link to comment Share on other sites More sharing options...
chimera Posted January 18, 2005 Report Share Posted January 18, 2005 i bought a hydrometer about 6 months ago, well worth it's weight in gold. the floating type was out in comparison everytime. Quote Link to comment Share on other sites More sharing options...
Pies Posted January 18, 2005 Report Share Posted January 18, 2005 i bought a hydrometer about 6 months ago, well worth it's weight in gold. the floating type was out in comparison everytime. ? I use a refractometer, hydrometers are much harder to read and get accurate results. Quote Link to comment Share on other sites More sharing options...
cracker Posted January 18, 2005 Report Share Posted January 18, 2005 So long as you copy NSW with your own Hydro, it should be fine yeah? That would seem obvious to me. If your hydro reads 23 with NSW then run your tank at 23 also, etc etc. Quote Link to comment Share on other sites More sharing options...
lduncan Posted January 18, 2005 Report Share Posted January 18, 2005 Hard to say. A better bet would be to find someone with a refractometer and calibrate your hydro to that. Then make sure it's kept clean. Layton Quote Link to comment Share on other sites More sharing options...
chimera Posted January 18, 2005 Report Share Posted January 18, 2005 ? I use a refractometer,... Aye carumba - thats what I meant... Quote Link to comment Share on other sites More sharing options...
Brianemone Posted January 18, 2005 Report Share Posted January 18, 2005 depends on the hydrometer, i know one of mine was right on the money, problem is they only tend to last two weeks around me Quote Link to comment Share on other sites More sharing options...
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