I Have 31 Cory Fry (11 Days Old) How Old Do They Need To Be Before I C

[zigzagabout]

Hi I have 31 eleven day old cory fry in a breeding net in my main tank. I have set up a new tank for them ( it's going through a fishless cycle at the moment) any idea at what age they can be transfered into the new tank without harming them? I know I have to wait for the cycle to complete and that not to move them all at once, but any advice would be helpful.

 

[TwoTankAmin]

Fry make very little waste. So you do not to to have a tank cycled to the level you might for more dult gish. Further, the bacterial colonies will tend to grow in size apace with the increased bio-load as the fry gain size. the most important things you can give the fry once they are free swimming (absorbed 100% of thei yolk sac) is good food and clean water. You can feed small amounts a few times during the day. Try to vac up excess food and obvious poop a few times as well. A rigid tube on the end of an airline size hose is great for this.

Pretty much you can move them once they are at the free swimming stage. One thng a lot of folks do not know is that breeder nets can be dangerous when they are used in tanks with many other fish. The reason is simple, the same yolk sac that is nouroishing the new baby in its first days is super food. The other fish know this and they have no problem trying to get at it through the net. They can actually manage to suck it right out through the mesh. For this reason I suggest that if one must use a fry trap, use a more solid type not the net type.

In the past year I stumbled upon a trap that actually hangs on the outside of the tank. It is powered by an air pump and water comes out of the main tank into the trap and then flows over an outflow at the opposite end back into the tank. I also use them to hold fish overnoght prior to shipping them. It is made by Marina and I get them here ins the states from kensfish.com. They work great but have one minor drawback that is easily handled. The flow rate through the trap is not real fast. So while it works well to keep water circualting etc., it tends to suck in the water borne debris from the main tank through the trap intake system. The low flow allows them to accumulate in the trap bottom. The solutions is simple. Use a fine mesh media bag over the intake and the problem is avoided. Do not try floss or sponges as these impede the flow too much. The water flows into the trap using the same principles as an air powered sponge.

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