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03/25/2006, 06:00 PM
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#1 |
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Registered Member
Join Date: Mar 2006
Location: S.E. Florida
Posts: 16
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Formula for lowering salinity
I was wondering if there was a formula for lowering the salinity of your tank.. Say you are reading 1.026 and want to bring it down to 1.022 and you know the total volume of water in your system including sump. Is there a formula that results in: "remove 10 gals and add back 10 of fresh" or maybe even just add x gallons to sump? Thanks..
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03/25/2006, 06:07 PM
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#2 |
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Registered Member
Join Date: Mar 2006
Location: winter park, fl
Posts: 1,078
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i'm not a pro at this yet, but i think you need to lower it slowly.
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03/25/2006, 06:11 PM
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#3 |
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Registered Member
Join Date: Mar 2005
Location: Lehigh Valley, PA
Posts: 7,038
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25% w.c. at 1.009 will bring you to 1.022
you can lower salinity by .004 every 24hrs., but only by .002 every 24 hrs. if raising
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Smug Egotistical Contemptuous It's difficult to get a man to understand something that his salary requires him not to. |
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03/25/2006, 06:21 PM
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#4 |
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Genius
 
Join Date: Jun 2005
Location: The Island of Misfit Toys
Posts: 3,131
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Yes there is, but since leaving school my calculus has been quite rusty. I'm sure any math teacher here could whip it out in no time.
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"The man who reads nothing at all is better educated than the man who reads nothing but newspapers." Thomas Jefferson Current Tank Info: Out of the marine aquarium hobby |
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03/25/2006, 06:37 PM
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#5 |
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Registered Member
Join Date: Oct 2005
Posts: 112
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after you've done it a while, you'll stop measuring even salt per gallon
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03/25/2006, 06:38 PM
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#6 | |
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Registered Member
Join Date: Mar 2005
Location: Lehigh Valley, PA
Posts: 7,038
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Quote:
to lower salinity safely? you lower yours that often?
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Smug Egotistical Contemptuous It's difficult to get a man to understand something that his salary requires him not to. |
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03/25/2006, 07:57 PM
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#7 |
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RC Staff
 
Join Date: Oct 1999
Location: Illinois'ish
Posts: 38,805
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Mike Current Tank Info: 60G Cube |
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03/25/2006, 08:10 PM
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#8 |
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Registered Member
Join Date: Mar 2006
Location: S.E. Florida
Posts: 16
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that is exactly what I was looking for mhurley.. thank you very much.
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03/25/2006, 08:36 PM
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#9 |
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RC Staff
Join Date: Oct 1999
Location: Illinois'ish
Posts: 38,805
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For some reason, I find that calc seems to work better when you use salinity numbers versus specific gravity numbers.
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Mike Current Tank Info: 60G Cube |
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03/25/2006, 08:43 PM
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#10 |
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Premium Member
Join Date: Jul 2004
Location: Wausau, Wisconsin
Posts: 1,278
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Remove a gallon of tank water, add a gallon of fresh. You have a 125g tank, so that's fine. I do it in my 90g when it drops a gallon from evaporation, add a gallon of fresh water that is. It takes a bit to get it to where you want, but it won't shock the system.
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03/25/2006, 09:46 PM
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#11 | |
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Registered Member
Join Date: Oct 2005
Posts: 112
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Quote:
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03/25/2006, 11:16 PM
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#12 |
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RC Mod
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Slowly, slowly, slowly: critters abhor sudden moves. 1.022 is pretty low. I run 1.024 ordinarily, verging on .25.
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Sk8r Salinity 1.024-6; alkalinity 8.3-9.3 on KH scale; calcium 420; magnesium 1300, temp 78-80, nitrate .2. Ammonia 0. No filters: lps tank. Alk and cal won't rise if mg is low. Current Tank Info: 105g AquaVim wedge, yellow tang, sailfin blenny,royal gramma, ocellaris clown pair, yellow watchman, 100 microceriths, 25 tiny hermits, a 4" conch, 1" nassarius, recovering from 2 year hiatus with daily water change of 10%. |
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03/26/2006, 02:31 AM
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#13 |
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Registered Member
Join Date: Jan 2005
Location: Goldsboro, NC
Posts: 514
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You should check into getting a refractometer, that is if you aren't using one already. The $40 price will be worth it the first time you compare it to your swingarm.
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Fred Current Tank Info: 75g reef 20g sump, 55g reef 10g sump |
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