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Salinity and PH |
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Salinity and PH |
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11-20-2001, 07:54 AM
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#1 |
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Tenant
Join Date: Mar 2001
Location: Winter Haven, Florida, USA
Posts: 62
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Salinity and PH
Continuing the Obring Saga on tank chemistry... can anyone tell me what is the relationship between temp and salinity? I run into problems when preparing water changes and mesuring the salinity. I have been using hydrometers from the begining (but I keep breaking them when storing them...please dont bash me cause i am a clutz!
 ) so I started using the lever kinda whatchamacallits. Also, what would all of you consider is an acceptable range for spec grav? I think  i am maintaining my 90 gal at 1.024, give or take a .001.In respect to PH, what do you all consider acceptable?
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11-20-2001, 07:58 AM
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#2 |
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Tenant
Join Date: Mar 2001
Location: Winter Haven, Florida, USA
Posts: 62
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I know it is kind of late to be finding out about all these things (alk, Ca, spec grav and PH)... but from my readings I thought I was keeping the right levels...and ten months down the line I am finding out it is not the case... thats why I am asking now... since I have always (knoc on wood) have gotten excellent and prompt response from the members in this board. Thanks to you all!!!!
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It all comes home in the evening tide!http://hometown.aol.com/obring/myhomepagesaltwatertank.html |
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11-20-2001, 08:52 AM
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#3 |
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Mayor
Join Date: Sep 2001
Location: Ann Arbor, Michigan
Posts: 657
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Well for not reading up on your stuff first, you sure are a lucky guesser!
 j/k you're right, salinity and temp are directly related to calculate the specific gravity. Here is a table for optimum levels for each temperature range. Degrees are in Fahrenheit. 50 1.0255 55 1.0252 60 1.0250 65 1.0246 70 1.0240 75 1.0233 80 1.0226 85 1.0218 90 1.0210 PH in reef tanks should be kept between 8.0-8.4 mine usually falls right around 8.3. You can adjust PH by using buffers, kalkwasser, and caulerpa algea will help stabalize it as well. HTH.
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Brian For those about to rock... I salute you! www.bongobrian.com Talk to me! aol: bongobrian78 msn: bongobrian@hotmail.com yahoo: bongobrian78 |
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11-20-2001, 09:18 AM
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#4 |
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Sci Fi Reefer
 
Join Date: Jun 2000
Location: central pa, usa
Posts: 394
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I would use the correlation of temperature and salinity as a guide.
My tank remains at 80 degrees +/-.03 at 1.025 salinity. I dont know too many reefers who keep their tank at 60 degrees and 1.025 salinity.
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"That is the sound of inevitability..." |
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11-20-2001, 01:05 PM
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#5 |
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Tenant
Join Date: Nov 2000
Location: Arlington, MA, USA
Posts: 65
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Ahhh, what a tangled web....
Salinity and temperature have no relationship whatsoever. Specific gravity and temperature have very little relationship. Hydrometer readings, however, do depend critically on temperature. This story is a long and complicated on that is ingored by nearly every hobbyist. That said, however, one does need to know some things. If one wants to convert hydrometer readings taken at temperatures other than the single temperature for which the hydrometer is intended to specific gravity, conversion tables can be useful. HOWEVER, one has to know the temperature that the hydrometer was designed for. Common tables are given for hydrometers claibrated for use at 60 deg F, but many hobby hydrometers are calibrated for other temperatures. In this case, use of the conversion table might make the answer worse,rather than more accurate. The specific gravity (60/60 deg F) of natural seawater is between 1.026 and 1.027. As to pH, seawater averages about 8.2. Tnaks operate fine between 8.0 and 8.4.
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