So while I think that the farms are partially to blame I also think that it is the responsibility of each of us as well.
The farms and the breeders are supplying what we are asking, more attractive fish, different colour variations, new fin shapes, large fish. If you want more robust fish you...
Yeah so what you are talking about there is species which have adapted to very cold very stable environments. But most fish which dwell near the surface (using >500m as "surface") can tolerate some form of temperature shift. Several Antarctic species temperature ranges can cover 4 degrees (-2 to...
If you want you can get a little pipe cleaner which will fit inside and you can give it a little scrub. But 3 rinses with fresh water should be sufficient to get rid of anything.
Would the yolk sac run out quicker, I'm not sure, its possible that juveniles which are hatched require more energy, its possible early hatching means less developed there are so many factors that I couldn't say for certain.
Rotifers are small zooplankton. The most common species used as live feed is Brachionus plicatilis
Here is an old review but covers the basics : https://www.researchgate.net/profile/Esther_Lubzens2/publication/225930989_Rotifer_as_food_in_aquaculture/links/0f31753722104c910f000000.pdf
Just...
Maybe, the lower temp might help them it will certainly slow down the use of the yolk sac.
It's hard, it's not great when they don't develop but at the same time there is very little you can do at that stage. All of the development up to the point of first feeding is controlled by the...
I have had egg from them, but never got round to doing them.
I have done quite a few other species like Angels, Discus, but when you do it for work its not the first thing you want to do at home
I have updated with the thesis title, if you copy that into Google scholar it should come out for you :) it's free to access too.
It is possible that they don't require life food to start feeding, it really just depends on their life history. take the lumpfish for example it will just go...
I will preface by the way and say I have not (yet) bred Cory's and am drawing on experience with other species. So If I am saying stuff which doesn't apply to the species someone just shout up ( looking at you @NCaquatics ;) )