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Thread: Can CRS be kept without chiller?

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    Default Can CRS be kept without chiller?

    Hi all,
    anyone ever successfully keep CRS without chiller. Maybe just a a fan?

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    the answer is YES.

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    Quote Originally Posted by sazuka View Post
    the answer is YES.
    care to share? i tried putting them at norm temp few hrs later they report to heaven..norm temp is singapore temp...28-27c

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    if like that, i dont think its temp problem.
    try to test the water parameter, like ph, no2,3....

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    In summer, i also didn't use chiller but put a fan on the top of the tank.
    Surprisingly, the water temperature didn't go up more than 28degree C. there was no problem.

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    For those who keep successfully w/o chiller, did your CRS breed?

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    Quote Originally Posted by kwonghui View Post
    For those who keep successfully w/o chiller, did your CRS breed?

    yes, my friend start wif 10pcs, now around 70-80pcs.
    tank setup around 6 months, w/o chiller.
    but he crs is grade A, no sure about higher grade.
    just for reference.

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    My CRS has been breeding for almost two years without a chiller.
    If it gets very hot in the summer I put a fan in front of the tanks during the day. But that only happens for a short period here.
    Most of the year I'm heating my shrimproom.

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    Quote Originally Posted by kwonghui View Post
    For those who keep successfully w/o chiller, did your CRS breed?
    Quote Originally Posted by sazuka View Post
    yes, my friend start wif 10pcs, now around 70-80pcs.
    tank setup around 6 months, w/o chiller.
    but he crs is grade A, no sure about higher grade.
    just for reference.
    Specifically for Singapore & Malaysia it is possible but from what I heard for the lower grade ones are ok but for the higher grade ones you will see that the colour will turn dull...

    It is preferable to have a chiller when keeping CRS... It is not a must but be prepared that you might have higher mortality rate plus the fact that CRS prefer contant temperatures... Without a chiller & using a fan can only bring down the temperature so much... Plus the fact that the water in your tank is directly connected to the ambient temp in the environment. So if you are experiencing a very hot day the temp in your tank will go up correspondingly, same if it is a rainy day the water temp will also go down...

    The max you can lower using fans is maybe 3-5 degrees & you will need to top up the water rather frequently due to evaporation... When you top up the water you are also changing the water parameters due to new water being added to the equation... If the tank is small like a 1 footer you might be changing the parameter more due to the smaller volume (In percentage terms)

    For the question on breeding... CRS prefer to breed in lower temperatures around 24-26 degrees... With higher temperatures there are also higher chances (Not necessary 100%) that the CRS will drop their eggs.

    Quote Originally Posted by taring77 View Post
    care to share? i tried putting them at norm temp few hrs later they report to heaven..norm temp is singapore temp...28-27c
    For this case it could be because the tank was not fully cycled... You need to be patient for a new setup to be fully cycled... It takes around 4-6 weeks for the Beneficial Bacteria (BB) to grow & be stable in your filter... This is the bacteria that will be "treating" your water so if the BB is not stable or insufficient in your tank you will have deaths in your tank...

    I would suggest that you buy some test kits to check your water parameters...

    Ammonia - 0
    No3 - 0
    No2 - Trace amounts

    This is the when the tank is fully cycled & an ideal enviroment for CRS...

    Hope this helps...

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    I have no problem keeping mine, i'm using a fan for a 2ft tank. The temperature is around 24C. They are living well but kind of stopped breeding, have not really checked into it. Or maybe they did breed but hidden in the moss because the moss have grown quite a lot and I did not trim it.
    Last edited by Robert; 20th Dec 2007 at 07:52 AM. Reason: bad orthography

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