SRC Member Lawrence Posted December 2, 2003 SRC Member Share Posted December 2, 2003 Dear all, Can I ask if the hydrometer green line is below water level & measure at 1.10 is it acidic or alkaline? Is it too much salt or less? Pls advise, Quote Link to comment Share on other sites More sharing options...
SRC Member Kalib Posted December 2, 2003 SRC Member Share Posted December 2, 2003 First of all ,lemme make things clear. A hydrometer does NOT measure the pH of water. It measures the salinity(or specific gravity,SG) of the water. The SG of saltwater should be at 1.023-1.025. 1.10 is too salty, must dilute the water with freshwater to lower the SG. Quote Link to comment Share on other sites More sharing options...
SRC Member SpiderOne Posted December 2, 2003 SRC Member Share Posted December 2, 2003 if ur Sg is 1.10 ur green line is going to be way above water level not below. u sure u read correctly? Salinity should ideally be 1.021 - 1.024 Quote Link to comment Share on other sites More sharing options...
SRC Member hammer99 Posted December 2, 2003 SRC Member Share Posted December 2, 2003 Hi, A question : if the salinity is at 1.022 to 1.024, does it mean that the PH close to 8.2 If there any relationship between salinity and PH Thanks Quote Link to comment Share on other sites More sharing options...
Ammonit Posted December 3, 2003 Share Posted December 3, 2003 Hammer99, Salinity has nothing to do with pH. They are two different parameter. Pls read up on the matter and difference between all the water parameters. Quote Link to comment Share on other sites More sharing options...
SRC Member Lawrence Posted December 3, 2003 Author SRC Member Share Posted December 3, 2003 have also change half of water but notice the hydrometer is still 1.10 water level is above the green lei, pls advise! Quote Link to comment Share on other sites More sharing options...
Morgan Posted December 3, 2003 Share Posted December 3, 2003 Is the green marking above the water line or below the water line? 1.10 is too salty....you should add water to dilute it. Quote Link to comment Share on other sites More sharing options...
SRC Member Lawrence Posted December 3, 2003 Author SRC Member Share Posted December 3, 2003 The green marking is below the waterline! Thanks! Quote Link to comment Share on other sites More sharing options...
SRC Member Lawrence Posted December 3, 2003 Author SRC Member Share Posted December 3, 2003 Dear All, I see the wrong reading it is 1.010 green is below the waterline! Quote Link to comment Share on other sites More sharing options...
SRC Member blacknails Posted December 3, 2003 SRC Member Share Posted December 3, 2003 Ok then you should add more salt to make the reading around 1.023.. And pH is determined and buffered by your coral sand (I think) and has nothing to do with your hydrometer.. I dun really know what the green line is for but could it be that the water level in the hydrometer should be at the green line? You should ask the LFS how to use the hydrometer first, actually... Quote Link to comment Share on other sites More sharing options...
SRC Member Volitan Posted December 3, 2003 SRC Member Share Posted December 3, 2003 Dear All, I see the wrong reading it is 1.010 green is below the waterline! This is good for brine shrimps. Quote Link to comment Share on other sites More sharing options...
SRC Member Volitan Posted December 3, 2003 SRC Member Share Posted December 3, 2003 This is good for brine shrimps. Or is it 1.012?? Quote Link to comment Share on other sites More sharing options...
SRC Member Tanzy Posted December 3, 2003 SRC Member Share Posted December 3, 2003 Hydrometers only read specific gravity (S.G.), not salinity. blacknail, Please change your avatar picture. It's not appropriate in this forum. Quote Warning: Heavy handed moderator in operation. Threads and post are liable to be deleted or moved without prior notification. Moderator's prerogative will be enforced. Any grievances or complains should be addressed to The Administrator. http://www.sgreefclub.com/forum/uploads/post-36-1073276974.gif Link to comment Share on other sites More sharing options...
FuEl Posted December 3, 2003 Share Posted December 3, 2003 hhuH? I thought brine shrimp hatch in the same salinity as seawater? Lower salinity possible meh? Anyway..Tanzy...so the difference between S.G and salinity is that salinity measures the percentage of salt in the water...while specific gravity actually measures the density of the water which actually varies with temperature? Quote Always something more important than fish. http://reefbuilders.com/2012/03/08/sps-pico-reef/ Link to comment Share on other sites More sharing options...
SRC Member regularguy Posted December 3, 2003 SRC Member Share Posted December 3, 2003 salinity measures the percentage of salt in the water...while specific gravity actually measures the density of the water which actually varies with temperature? from my understanding, that's correct but lets not confuse lawrence further here. Quote Link to comment Share on other sites More sharing options...
SRC Member ozy Posted December 3, 2003 SRC Member Share Posted December 3, 2003 hhuH? I thought brine shrimp hatch in the same salinity as seawater? Lower salinity possible meh? Anyway..Tanzy...so the difference between S.G and salinity is that salinity measures the percentage of salt in the water...while specific gravity actually measures the density of the water which actually varies with temperature? Ok, I understand this and I know that salinity is the actual parameter we are trying to achieve. Is there a ratio as to the volume of water to the amount (weight) of salt to achieve a more accurate salinity? What is the ratio? Can anyone care to share? Quote Link to comment Share on other sites More sharing options...
SRC Member hammer99 Posted December 3, 2003 SRC Member Share Posted December 3, 2003 Hi, The approximate ratio is 1kg of salt equate with around 30L of tape water. I've another question : So does it mean tat if the salinity is right, the PH may not be at 8++ so if my tank doesn't contains any coral sand, the PH will remain at 7 Thanks Quote Link to comment Share on other sites More sharing options...
SRC Member Tanzy Posted December 4, 2003 SRC Member Share Posted December 4, 2003 Salinity is not directly related to pH. You can draw conclusions that at a certain salinity the water will be at a certain pH. Salinity is just a measure of how much salts are in the water. pH will depend on the composition of the various salts in the water. Coral sand does not buffer the water at normal seawater pH. Quote Warning: Heavy handed moderator in operation. Threads and post are liable to be deleted or moved without prior notification. Moderator's prerogative will be enforced. Any grievances or complains should be addressed to The Administrator. http://www.sgreefclub.com/forum/uploads/post-36-1073276974.gif Link to comment Share on other sites More sharing options...
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