What causes parent raisers to...

[EverythingAquatic]

Start eating wigglers again?

My Black pair have successfully raised 2 spawns.  But lately eat them as soon as they hatch.  At first I thought the wigglers were just moved.  But that simply isn't the case.



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[Mugwump]

Start eating wigglers again?

My Black pair have successfully raised 2 spawns.  But lately eat them as soon as they hatch.  At first I thought the wigglers were just moved.  But that simply isn't the case.



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IMHO.......1) that can happen when one of the parents gets out of sync with the other, one's just not ready....2) the other thing is the tank needs a real large water change a few times in a row....like 75-80%....3) if you have a sponge filter, squeeze the beejabbers out of it in tank water....if a HOB filter...pull it off and scrub it out...never do both at the same time tho....you'll blast away the bio...

We've all had pairs do this from time to time....#1 is more often the culprit.....sometimes it's as simple as separation for a few days, then back together again, that can get em doing it right....

[EverythingAquatic]

Well, they are in a 30g tank.  Huge sponge filter...rated for a 130g tank.  I normally do 50% weekly water changes as well.  As I suspect I have a new pair with the Peruvian Glitters I think I am going to do a little swapping and put the new black line on hold.  See if I have better luck with a different pair.

I am also trying to get a pair out of the Blue Zebra / Red Capped Koi spawn I started.  Only have a few survivors, but if I can get even one pair out of them I can continue this line I started.  Maybe I will spend some time focusing on these guys.

Thanks for your thoughts Jon.  Very helpful!

[Mugwump]

Well, they are in a 30g tank.  Huge sponge filter...rated for a 130g tank.  I normally do 50% weekly water changes as well.  As I suspect I have a new pair with the Peruvian Glitters I think I am going to do a little swapping and put the new black line on hold.  See if I have better luck with a different pair.

I am also trying to get a pair out of the Blue Zebra / Red Capped Koi spawn I started.  Only have a few survivors, but if I can get even one pair out of them I can continue this line I started.  Maybe I will spend some time focusing on these guys.

Thanks for your thoughts Jon.  Very helpful!

Instead of a different pair, swap both the parents with different mates....the original parents at least got it right when they did raise....

[EverythingAquatic]

I do have an unpaired DD Black male.  I could swap them and see how it goes.  I've always heard if both parents were DD that there would be issues with the fry.

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[Mugwump]

I do have an unpaired DD Black male.  I could swap them and see how it goes.  I've always heard if both parents were DD that there would be issues with the fry.

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DD's most the time can be like that...but occasionally you get lucky  ...years ago I had a DD pair that great......if they both carry a gold(hybrid), which is likely, you'll have a better shot..