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  1. #1
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    FOWLR Salinity Question

    Hi Everyone,


    I was just wondering what is optimal salinity for Fish only tanks. I keep mine at 1.025 to 1.026 but have read that it is better at 1.024 - 1.024 I use a refractometer for my readings. Also how are my other readings below. I use Kent Marine, Marine buffer as an additive and use RO/DI with Instant Ocean Regular salt.

    Salinity 1.025- 1.026
    PH 8.1 - 8.3
    Nitrite 0
    Nitrate 0 - .5
    Ammonia 0
    KH 3.5 - 4
    Calcium 350 - 400

    Thank You
    Terry

  2. #2
    Senior Member volitan's Avatar
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    salinity is fine.If you want some corraline algea to grow on your rocks you will have to bring your calcium to 400-450.Make sure you dont add too much buffer like i did and ended up with a phosphate problem.

    What types of fish and what size of tank do you have?
    Derik...

  3. #3
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    55gal with two puffer fish one 11inch one 4inch

  4. #4
    Senior Member reefmutt's Avatar
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    You could easly bring that salinity down to 1.021- Lower salinities (to a point obviously) reduce fish stress by making it easier for them to expell salt from their systems as well as increasing disolved oxygen levels in the tank water. Lower still, like around 1.017 will also keep the fish happy (the corraline algea probably won't be at that level, though) and will slow or inhibit any possible ick outbreak.
    Matt.

    Old system torn down to make a playroom.. planning a 62x42x28 high

  5. #5
    Senior Member volitan's Avatar
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    And what about snails?will lower salinity afect them alot?
    Derik...

  6. #6
    Member EmilyB's Avatar
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    I keep the salinity at least 1.024 on the FOWLR. Regardless of how muich easier it is for fish in lower salinity, the ocean isn't like that, and you will have other things in there, for example your snails.

  7. #7
    Senior Member reefmutt's Avatar
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    At 1.021 and proper buffering, the snails won't be bothered, lower than that, maybe.
    EmilyB makes a good point about the ocean, but an aquarium isn't like the ocean either. Wild fish in a tank have to deal up close and personal with other fish they would never necessarily get close to in the ocean- sometimes this will stress them out. Dropping the salinity a little is a good way to help alleviate some of the stress in a tank wich may otherwise cause them to get sick. I'm not saying it is a must- just food for thought
    Matt.

    Old system torn down to make a playroom.. planning a 62x42x28 high

  8. #8
    Member EmilyB's Avatar
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    True enough reefmutt. I guess because I have multiple tanks, I tend to keep them close in chemistry, because I move things around.

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