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Thread: CRS babies are dying

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    Default CRS babies are dying

    I have big problem with my CRS. In my ordinary tank CRS babies not growing up to adults. Now I decided to test an other possibility. I put some of my berried females CRS in to small 25l tank which I set up 2 months ago. Now babies are coming and they still die.
    They die during the first molt. I have seen them only couple of days. My water parameter are:

    pH 5,8
    GH 4
    KH 0
    NO3-2
    PO4- 0
    TDS- 175ppm
    Temp 23C

    I use Oliver Knott substrate and feed Dennerle food.

    So I tested my well water and it was TDS 110, GH-4 and KH-4
    I filtrate my well water with 3 step filtration system including activated carbon and ceramic filter.

    I confused, why TDS in tank so high??? And what cause CRS babies death.

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    The baby die on first moult or they grow till about 1.5mm then die?
    shrimpydaddy.com

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    I have a 3 berried female in my tank and for now they all empty. I have seen only some babies. Now I can't see no one.
    In one case I saw how 1,5 mm shrimplet is strugeled to molt and after some hours shrimplet was dead stuck his exoskeleton.

    I can measure Mg and K if it helps.

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    Hmmm... That sounds like either the shell is not soft enough or the body does not filled up with enough liquid to expand and break the shell first. Do you see them die after the shell came off?
    shrimpydaddy.com

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    Yes I saw that shell was stuck their legs.

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    Usually unable to break off the shell is caused by either lack of sodium and/ or potassium or the water is too alkaline. If your pH testing is accurate, then lack of sodium and/ or potassium has higher possibility.
    shrimpydaddy.com

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    I measured the potassium and it was 15-16 mg/l. I can't measure sodium. I do not know, was it wise but I changed 20 % of water.
    I have some slimy long threaded green algae in tank, but it probably not the case. I checked pH again and it is below 6.0 JBL drop test was yellow.
    May be it is too low?

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    Spirogyra is the sign of ammonia spike and intense lighting.

    Hmmm... Do you have other test kit that could test the pH 5.x range? If it is 5.8, it is fine but anything lower then may be a problem.

    By the way, potassium test kit is not accurate when sulphate is present.

    I just realised you have CRS. In this case, you should add another 2dGH to your well water. CRS does not live well in lower GH. Do you have high definition close-up photo of your adult shrimp? Looking at their shell will tell what kind of nutrients they are lacking.
    shrimpydaddy.com

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    As I said I changed 20% of water and after that ph was 6,3. Is OK I think. I can raise the GH by adding Seachem Equilibrium. Is it OK?

    I put some pictures of my shrimps here.
    First one is taken of females in small tank I described previously.
    DSCN2663.jpg
    On second one is taken of my shrimp from ordinary big 160L tank
    DSCN2686.jpg
    And overall view of my small tank.
    DSCN2689.jpg

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    The adult looks OK, just that the shell is not shiny enough.

    Yes, increasing the GH with Equilibrium is fine.
    shrimpydaddy.com

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