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Raising calvus fry

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Any tips on how to successfully raise black calvus fry.

I had a large batch initially and now I'm left with about 10 if I'm lucky. In the last batch I lost the whole lot eventually.

This time I tried two different ways. The first way I put a fry saver (made by Lionel) whihc has an airstone and outlet for water to go back into main tank. I emptied some of the free swimming fry from the female calvus shell into the fry saver. Fed frozen BBS and powdered protein food about 3 times a day. The bottom of the fry saver seemed to get dirty so I siphoned the saver only a couple of times as I'm not sure if I previously siphoned some fry as I found it hard to see. I now have about 2 fry left.

Second way - I emptied some of the free swimming calvus into a fry saver that Matthew made which I have added an airstone to. It's in a one foot tank that I grow out fry in. Fed same as above. Still have about 8 left.

I guess it's all a learning experience so wondering how others raise the fry more successfully?

Thanks.

Shirley

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i find the second way better the trick is keep the floor clean and dont overfeed

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Try putting some small bristlenose in the frysaver with them.Also it's better if you can feed them with live baby brine and at least twice a day until they get some body to them then you can try ground-up flake/pellet.

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When I bred comps and calvus I moved all the fry into small 40l tanks and used live daphnia and a sponge filter as filtration.

I fed the daphnia spirulina powder and the alto fry were fed live brine shrimp 2 times a day.

I raised and sold close to 500 fry at 4cm using this method.

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