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Page 1 of 2 12 LastLast
Results 1 to 10 of 12
  1. #1

    Default Corydora Fry Wipe-out


    0 Not allowed!
    Hello again,

    About 4 days ago, no longer than that, I've noticed 2-3 cory fry (2.5 weeks old) dying rapidly. They had white, fuzzy tails and died very rapidly. Death rate increased exponentially and today, the 4th day, I've lost every single one of my 80+ cory fry. As far as I know, it was not actually fungus since fungus is said to work its way slowly. I've done all the necessary bottom cleaning, daily water changes etc. I also tried Pimafix but to no avail.

    I would VERY much appreciate any input/advice/suggestion as I am quite mad about this and furthermore... upset. Thanks a million...

    P.S: It was a 15 gallon bare bottom tank.

  2. #2

    Join Date
    Jan 2009
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    A little further from sanity
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    Awards Showcase

    Happy Mother's Day! - Slaphppy7 For 7,000 posts!! - steeler58 Thanks for the rep!! - steeler58 For working with new fish keepers! Outstanding this month. - Taurus Just Because - Surfdog 
    A round for the fallen this Memorial Day weekend. - Compass I had no cup, so I put it on a bun... - Slaphppy7 You are amazing! So smart and giving. - SeaLady Can't give you any more rep, but well said! - steeler58 Thank again!! You seem to enjoy your coffee. - steeler58 
    Thanks for the rep!! - Compass this doesnt look like pie... not the right kind.. - Sandz for providing solid guidance to others - RiversGirl Thanks for the rep! :) - Compass cheers - Fishhook 
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    Default


    1 Not allowed!
    My guess would be a water quality issue of some sort. White fuzzy tails sounds like fin rot which is what points me to some issue with the water. Fry need well aerated and pristine water to thrive. They also need a lot of quality food (feed small quantities often). Not knowing more about your tank, that is my guess. I am not saying you don't take care of the tank (I really don't know). But things like the improper hardness, temperature, etc can affect fry much quicker than a juvie or adult fish.
    Last edited by mommy1; 02-15-2014 at 04:43 PM.
    When I go fishing I just place a sharp rock in the water and sit there waiting for all the dead fish to float to the top... Kingfisher
    Brutal honesty will be shown on this screen.
    I think my fish is adjusting well to the four gallon, He's laying on his side attempting to go to sleep on the bottom of the gravel.
    Tolerance is a great thing to have, so is the ability to shut up.

    I can explain it to you, but I can't understand it for you.


  3. #3

    Default


    0 Not allowed!
    Quote Originally Posted by mommy1 View Post
    My guess would be a water quality issue of some sort. White fuzzy tails sounds like fin rot which is what points me to some issue with the water. Fry need well aerated and pristine water to thrive. They also need a lot of quality food (feed small quantities often). Not knowing more about your tank, that is my guess. I am not saying you don't take care of the tank (I really don't know). But things like the improper hardness, temperature, etc can affect fry much quicker than a juvie or adult fish.
    I think you're quite right, thank you for your suggestion. I kept using main tank water and the water from the 20 gallon tank, at different times, to top up the fry tank water. I imagine something along the way went wrong. Also, I cannot use a power filter as I'd be losing fry even faster than the tail-rot. Sponge filter is the only way which does not help much.

    That said, would treated tap water (same temperature as the water in fry tank) be alright for water changes? That's the only clean method I can think of. Though the tiny water bubbles after the water change annoys me.

  4. #4

    Join Date
    Jan 2009
    Location
    A little further from sanity
    Posts
    7,997

    Awards Showcase

    Happy Mother's Day! - Slaphppy7 For 7,000 posts!! - steeler58 Thanks for the rep!! - steeler58 For working with new fish keepers! Outstanding this month. - Taurus Just Because - Surfdog 
    A round for the fallen this Memorial Day weekend. - Compass I had no cup, so I put it on a bun... - Slaphppy7 You are amazing! So smart and giving. - SeaLady Can't give you any more rep, but well said! - steeler58 Thank again!! You seem to enjoy your coffee. - steeler58 
    Thanks for the rep!! - Compass this doesnt look like pie... not the right kind.. - Sandz for providing solid guidance to others - RiversGirl Thanks for the rep! :) - Compass cheers - Fishhook 
    Using up my winnings on my friends! - Compass No Message - Fishhook beeeeeeeer! - Sandz Bottoms up! (even though you don't drink, lol) - Slaphppy7 We miss you... - Compass 

    Default


    1 Not allowed!
    In order to keep the water clean enough for fry you must remove some and clean the bottom of the tank and add clean, fresh, dechlorinated water. If you only add water without first removing water from the fry tank, you will have a build up of dissolved solids in the water which will eventually lead to water that is too hard for the cory. You could also be adding nitrates from the old tank water which could be the cause of the fin rot. Sponge filters are common in fry tanks.
    When I go fishing I just place a sharp rock in the water and sit there waiting for all the dead fish to float to the top... Kingfisher
    Brutal honesty will be shown on this screen.
    I think my fish is adjusting well to the four gallon, He's laying on his side attempting to go to sleep on the bottom of the gravel.
    Tolerance is a great thing to have, so is the ability to shut up.

    I can explain it to you, but I can't understand it for you.


  5. #5

    Default


    0 Not allowed!
    Quote Originally Posted by mommy1 View Post
    In order to keep the water clean enough for fry you must remove some and clean the bottom of the tank and add clean, fresh, dechlorinated water. If you only add water without first removing water from the fry tank, you will have a build up of dissolved solids in the water which will eventually lead to water that is too hard for the cory. You could also be adding nitrates from the old tank water which could be the cause of the fin rot. Sponge filters are common in fry tanks.
    Oh for sure. That's what I had been doing from the hatching, up until now. About 25-35% water replacement after cleaning the bottom thoroughly. Once every other day.

    So you think dechlorinated tap water should be okay? Of course if/when I have the next batch of fry, I plan on doing this for a small group first, then applying it on the rest.

  6. #6

    Join Date
    Jan 2009
    Location
    A little further from sanity
    Posts
    7,997

    Awards Showcase

    Happy Mother's Day! - Slaphppy7 For 7,000 posts!! - steeler58 Thanks for the rep!! - steeler58 For working with new fish keepers! Outstanding this month. - Taurus Just Because - Surfdog 
    A round for the fallen this Memorial Day weekend. - Compass I had no cup, so I put it on a bun... - Slaphppy7 You are amazing! So smart and giving. - SeaLady Can't give you any more rep, but well said! - steeler58 Thank again!! You seem to enjoy your coffee. - steeler58 
    Thanks for the rep!! - Compass this doesnt look like pie... not the right kind.. - Sandz for providing solid guidance to others - RiversGirl Thanks for the rep! :) - Compass cheers - Fishhook 
    Using up my winnings on my friends! - Compass No Message - Fishhook beeeeeeeer! - Sandz Bottoms up! (even though you don't drink, lol) - Slaphppy7 We miss you... - Compass 

    Default


    1 Not allowed!
    First check the hardness and pH of the tap water, if it matches the fry tank water then yes. If no, then you might need to make some adjustments.
    When I go fishing I just place a sharp rock in the water and sit there waiting for all the dead fish to float to the top... Kingfisher
    Brutal honesty will be shown on this screen.
    I think my fish is adjusting well to the four gallon, He's laying on his side attempting to go to sleep on the bottom of the gravel.
    Tolerance is a great thing to have, so is the ability to shut up.

    I can explain it to you, but I can't understand it for you.


  7. #7

    Default


    0 Not allowed!
    Quote Originally Posted by mommy1 View Post
    First check the hardness and pH of the tap water, if it matches the fry tank water then yes. If no, then you might need to make some adjustments.
    I move the eggs to a tank filled with fresh, dechlorinated tap water at 23-24C and let them hatch in there so unless there are major inconsistencies in the pH level of the water coming from the tap (one day 7.0, the next day 6.5 and 7.5 the day after), I imagine using dechlorinated tap water for water changes should be fine.

  8. #8

    Default


    0 Not allowed!
    Anybody else wanna add anything to what mother said? Anyone?

  9. #9

    Default


    0 Not allowed!
    How about those little air bubbles after adding fresh tap water? Any solutions for that? Let the water sit for a couple days perhaps?

  10. Default


    0 Not allowed!
    Quote Originally Posted by Zodiaq View Post
    How about those little air bubbles after adding fresh tap water? Any solutions for that? Let the water sit for a couple days perhaps?
    That would do it, but the air bubbles are harmless.

    -S

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