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Thread: checking salinity.

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    checking salinity.

    what does everyone use to check salinity and what salinity should a typical reef be at?

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    Refractometer. 1.024 to 1.026. SPS you want it on the high end.
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    cool thanks. I use a refractometer and my salinity is 35ppm or about 1.026. I was told by LFS that my salinity was too high so I thought I had better get a second opinion.

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    not for SPS, its not.
    The sea, once it casts its spell, holds one in its net of wonder forever. - Jacques Cousteau


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    Registered User scrumpto's Avatar

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    If I remember correctly, LFS's keep their salinity low for parasite control. Besides, you can usually take with a grain of salt what an LFS says IMHO. (pun not intended but it works ;-)

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    Registered User smokey's Avatar

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    Your salinity is fine. I usually keep mine about that range. Like scrumpto said, LFSs keep it lower to keep parasites under control (whether they actually know it or not). SPS do better at higher in the range as well as nems if you have or get any of those, or at least thats my experience.

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    Registered User stacy_vennes's Avatar

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    mine is always droppin to 1.023-1.022. what is the best possible way to keep it up?
    I'm not crazy I'm just southern!!

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    Salinity should not drop on you. I have never had a noticeable drop due to salt creep or skimmer extraction. Is your skimmer running extremely wet? Regardless, figure out how the salt is leaving the system and troubleshoot from there. I guess you could start a dosing schedule with low salt ro/di every now and then if you can not figure out the problem.
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  9. #9
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    Quote Originally Posted by stacy_vennes View Post
    mine is always droppin to 1.023-1.022. what is the best possible way to keep it up?
    viagra!


    maybe you have a leak you havent noticed?

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    the most common ways for salinity changes are skimmers skimming wet, and water changes. When I was new in the hobby, I would take out a little more than I replaced, and would finish off the rest with just RO/DI water. over the course of 5 or 6 water changes, I would notice a drop in salinity. Now I always keep a 5 gal bucket of dirty water from the water change and use that remainder to top the tank back off. That stopped my salinity changes.
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    Registered User stacy_vennes's Avatar

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    thank ya'll so much for the advice.
    I'm not crazy I'm just southern!!

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    Registered User scrumpto's Avatar

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    Quote Originally Posted by stacy_vennes View Post
    mine is always droppin to 1.023-1.022. what is the best possible way to keep it up?
    The only time I could see that happening is if you're skimming wet and replacing the loss with fresh water. Question, what equipment are you using to test salinity?

    I utilize two different plastic hydrometers to double-check. One thing I've noticed is that bubbles on the swing arm can vastly change the result so you have to be careful of this. Additionally, you need to wash these out with fresh water to avoid build up on the arm (or so I've heard).

    BTW, I read about an interesting practice of skimming wet on purpose and using salt water as the make up. Make interesting sense when you read it through.

  13. #13
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    Quote Originally Posted by scrumpto View Post
    The only time I could see that happening is if you're skimming wet and replacing the loss with fresh water. Question, what equipment are you using to test salinity?

    I utilize two different plastic hydrometers to double-check. One thing I've noticed is that bubbles on the swing arm can vastly change the result so you have to be careful of this. Additionally, you need to wash these out with fresh water to avoid build up on the arm (or so I've heard).

    BTW, I read about an interesting practice of skimming wet on purpose and using salt water as the make up. Make interesting sense when you read it through.
    didnt think of wet skimming that can have an effect after a while

    BTW ...the glass floating hydrometers are a much better option than the swing arms if your going the inexpensive route

  14. #14
    Registered User stacy_vennes's Avatar

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    i also have the plastic hydrometer and i do rinse it out after each use. and i dont replace the loss with fresh water. idk. i did a water change but only 10% and i have a 75 tank. i did the change bout 4 days ago maybe it still adjusting. i was just wondering cuz i never had a problem with my salinity. thank all ya'll for the advice.
    I'm not crazy I'm just southern!!

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    seascapes sells excellent refractometers for pretty cheap. I have one and I think i paid 65$. They are the best way to accurately measure salinity. Those plastic things arent accurate. I had one, then stepped on it and broke it, then invested in a refractometer. It is worth the investment. Also it doesnt take days for a tanks salt content to stabilize. after 24 hours (at the most) it has fully mixed. Also, are you topping your tank off with fresh water or salt water?
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  16. #16
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    Fishy sells the refractometers as well. If you are going to keep SPS, you really need to have one. I bought mine off of eBay for under $40, just make sure you get one that does temp correction and is for salt water, and not wine.
    The sea, once it casts its spell, holds one in its net of wonder forever. - Jacques Cousteau


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