Breeding Question

[wolfwolf]

I read the pinned article on breeding cories and I do not understand how it is possible to change the aquarium water with cold water. I thought a sudden change in water temp would have an adverse effect on the fish???

Second question. How do you get freeze dried brine shrimp down to the cories? My freeze dried shrimp float at the top until the tetras eat them.

Third question. What aquarium temp for cories? I read that 74F is prefered. They are more active. Is that the case?

 

[divisible by zero]

defrost the brine first, and or use a turkey baster

 

[drewry]

I read the pinned article on breeding cories and I do not understand how it is possible to change the aquarium water with cold water. I thought a sudden change in water temp would have an adverse effect on the fish???

Second question. How do you get freeze dried brine shrimp down to the cories? My freeze dried shrimp float at the top until the tetras eat them.

Third question. What aquarium temp for cories? I read that 74F is prefered. They are more active. Is that the case?

hi wolfwolf

i take 10% of the water out my tank and top it up with cold water to encorage them to spawn the sudden drop in temp stimulates them as it would in the wild with rain fall ,

iv never used freeze dried foods

well im still pretty new to corys myself only been geting into them proply the last 4 months
but 74F is ok depending on the speices i know bronze can tolarate up to 80F down to 70F
but some one with more expariance will be able to give more info on this as diffrarnt spices like deffernt temps but i think the magority is 74F

 

[Inchworm]

Hi wolfwolf

What kind of corys are you thinking about breeding? If it's C. aeneus (bronze or albino) or C. paleatus (Peppered corys), which are often the beginner's cory, they are easy to get to spawn if they are mature and well conditioned. Often a simple water change is enough to get them started. If it's some of the more unusual corys, they may take more effort. There are still quite a few species that have yet to be bred in captivity.

If you're pretty sure they're ready to spawn, and they don't do it on their own, try doing a good water change and bottom cleaning, and leave the heater off overnight. The water temperature will gradually drop, but not too much or too fast. Plug it back in the following day. Give them a week or so after that to see if they spawn.

If that doesn't work, try doing a water change and adding water cooler than what is in the tank, but don't drop the temperature more than about 5 degrees F. Again, wait and see if anything happens. If it doesn't, you will want to think about whether you want to continue and perhaps repeat the temperature drop every day for a few days. Unlike many tropical fish, corys don't usually get Ich, which is what you want to avoid by keeping the temperature stable, so it's best not to do this with a community tank.

If you're thinking about breeding corys, it's important to have patience. You cannot force them to spawn if they aren't ready.

As for "conditioning," since you live in the US, try to find a lfs that sells live blackworms. If you cannot find any, get some frozen bloodworms. They will make your corys strong and healthy and if they are mature, they'll help them develop a good number of eggs. Freeze dried brine shrimp is not a good food for this purpose. (To make it sink, try taking a few spoonfuls of tank water and adding it to some of the freeze dried product in a dish. Let it set until it absorbs water and softens. Then put into the tank.)

The ideal temperature for corys varies according to species.

 

[PRW1988]

The way you get the freeze dried foods to the bottom is......... you don't.... Try feeding frozen instead, much simpler and it'll actually get down to them.