Hi all, my first post here so I'll give a quick who I am and then get to business. I've been in the aquarium hobby for nearly 30 years. I have kept a wide range of fish and bred a few, mostly to raise my own numbers or supply a few to clubs, family and friends though I have sold some locally off and on.
I never kept Cories until this year and finally couldn't resist. I've moved a few years ago to very hard water and have found many things especially in breeding a bit more touch and go.
I picked up 5 Cory aeneus, 3 females, two males and they started breeding in QT so I decided since I wanted more anyway I'd raise out a few babies. That was in April/May and I'm still stuck. PH 8.2, kH 10, gH 15-16. Their tank has never hit nitrAtes of 20, was started with cycled media and they have no tank mates. I experienced failure to fungus for many many batches even using MB and separating eggs entirely until I got enough flow in the tank. Adults "mostly" leave eggs alone anymore, with that I've been leaving them in the tank. Now I can get the hatch about the time fungus starts on non viable (unfertilized) eggs... But I cannot get fry to survive past 5 days and have a very high mortality rate within 24 hours. Example of 72 viable eggs two weeks ago that hatched, I had two survivors at 24 hours and 1 lasted until day 7 that was my longest lived fry. Would the fact that fungus started on non viable play into my fry survival? I do remove non viable as they show signs of fungus but some may sit several hours while I'm at work and fungus does spread quickly....
I currently also raising a tank of CPD fry and have a huge variety of fry food... Sera micro, 5 micron golden pearls, decapaulated baby brine shrimp, frozen baby brine, daphnia and rotifers (also both frozen).
I understand adults aren't known for eating fry but after each hatch they will neglect to eat their beloved foods at all for 2-3 days so if that's pertinent I'm tossing it out.
All comments and help are appreciated and if necessary I do have a RODI system so I can make whatever water is needed but I've found no information leading me to precise parameters that may even help increase survival, though I am aware bringing params down to around 7.4-7.6 pH, and kh 5-6, gH 8-10 would likely help prevent fungus will less flow.
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I never kept Cories until this year and finally couldn't resist. I've moved a few years ago to very hard water and have found many things especially in breeding a bit more touch and go.
I picked up 5 Cory aeneus, 3 females, two males and they started breeding in QT so I decided since I wanted more anyway I'd raise out a few babies. That was in April/May and I'm still stuck. PH 8.2, kH 10, gH 15-16. Their tank has never hit nitrAtes of 20, was started with cycled media and they have no tank mates. I experienced failure to fungus for many many batches even using MB and separating eggs entirely until I got enough flow in the tank. Adults "mostly" leave eggs alone anymore, with that I've been leaving them in the tank. Now I can get the hatch about the time fungus starts on non viable (unfertilized) eggs... But I cannot get fry to survive past 5 days and have a very high mortality rate within 24 hours. Example of 72 viable eggs two weeks ago that hatched, I had two survivors at 24 hours and 1 lasted until day 7 that was my longest lived fry. Would the fact that fungus started on non viable play into my fry survival? I do remove non viable as they show signs of fungus but some may sit several hours while I'm at work and fungus does spread quickly....
I currently also raising a tank of CPD fry and have a huge variety of fry food... Sera micro, 5 micron golden pearls, decapaulated baby brine shrimp, frozen baby brine, daphnia and rotifers (also both frozen).
I understand adults aren't known for eating fry but after each hatch they will neglect to eat their beloved foods at all for 2-3 days so if that's pertinent I'm tossing it out.
All comments and help are appreciated and if necessary I do have a RODI system so I can make whatever water is needed but I've found no information leading me to precise parameters that may even help increase survival, though I am aware bringing params down to around 7.4-7.6 pH, and kh 5-6, gH 8-10 would likely help prevent fungus will less flow.
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