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Old 12-17-2005, 01:48 PM   #1
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salinity

My LFS keeps their saltwater fish in 1.018 SG and recommended the same to me. Me SG is 1.025. Should I gradually lower it to 1.018? Isn't the Ph more stable at 1.025?
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Old 12-17-2005, 01:49 PM   #2
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I stay at a happy medium of 1.022.
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Old 12-17-2005, 01:52 PM   #3
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I have heard that for a fish only tank a lower salinity is ok, but invertabrates and corals will not do well at those levels. If you want to keep anything other than fish, keep it up around 1.023 to 1.025.
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Old 12-17-2005, 02:04 PM   #4
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Fish stores keep there levels low to keep disease and parasite activity low and stimulate feeding.
If you have anything in your tank other than fish 1.018 will not work. Ph will be harder to maintain as well as all other essential elements. Salt mixes are designed to be mixed at around 1.025 so by lowering the salinity you are also lowering everything else, CA etc. If you have corals and inverts you should maintain levels between 1.024- 1.026 to keep them happy. Be sure you slowly acclimate fish to your salinity. 1.018 to 1.025 is a strressful change for fish if not done over days.
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Old 12-17-2005, 02:04 PM   #5
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Some LFS keep their salinity down to try and keep down outbreaks of ICH. The strange thing is, that they are giving you bad advice about how to keep your tank... The average salinity of natural sea water is around 1.023. This would be the safest range to stay with for a fish only and 1.024-25 for a reef... I hear people say all the time that "what works for you might not work for me". Well, the methods of basic husbandry, really haven't changed in years.
LFS are prone to give very bad advice due to the fact they are in it stricktly for the money and do not take the time to understand how it works. I hope you do not take that advice and stay where you are...
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Old 12-17-2005, 02:04 PM   #6
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is Ph more table at higher sg?
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Old 12-17-2005, 02:15 PM   #7
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Quote:
is Ph more table at higher sg?
Yes
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Old 12-17-2005, 02:20 PM   #8
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Quote:
The average salinity of natural sea water is around 1.023
Where did you get this info? If this is true why would you increase it for a reef? The idea it to keep them as close to the natural ocean as possible. Natural SW is 35ppt or 1.026. liverocks.com even confirmed this for me when they harvested my LR. I would re-check your source.
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Old 12-17-2005, 02:29 PM   #9
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Thanks for the great advice everyone. You're all awesome!! I'll leave my sg at 1.025. Now I'm a firm believer that LFS's give bad advice just to help profits. Go Figure!
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Old 12-17-2005, 02:49 PM   #10
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While we are on a role about salinity. Steve-s pointed this out to me and I have read up on it considerably. Salinity and SG are not the same thing. Salinity is how much "salt" is in the water. SG or specific gravity is used to measure density of water. If you would like more information on this I suggest you read this.
http://www.advancedaquarist.com/issu.../chemistry.htm
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