Originally Posted by bm5424
I'm going to breed jack dempseys in my 55 gallon. I can only find them small or mid sized. For pairing would I be best buying the mid sized one and buy a group or try my best to sex or buy the smaller ones as a group and let them pair. Also should I get a divider invade of agression and do I need to do anything special for them to breed. Lastly, are they good parents? When should I remove fry.
I have unwillingly become an expert at this. Lol not really expert but I have had a Couple of groups of JD fry. I bought 4 JD fish. Not for breeding but I learned afterwards this is the best way to breed. I can't sex them. I can mine because i know them and i have watched them but it's hard to explain to you how to sex them. Again I know now that buying 3-4 about the same size is the best way to do it. I am guessing it's your best chance of getting a male and a female to pair up. All of mine were about 4-5 inches. I thought they were too small to breed, but they weren't.
They say give them a smooth rock or something to lay eggs on, I didn't. Mine laid eggs on some decor I had in the tank. I don't know the spawning process I didn't pay that much attention, but the female lays eggs, and the male comes and fertilizes them. A few days later they hatch.
They are GREAT PARENTS! For a while. It is amazing to watch them parent. Very protective and attentive, they chew their food for them and everything. Somewhere between 4 and 8 weeks, when the spawning process starts they will turn on them. They will view them as the enemy to protect the new babies to come. So you should remove them. Some people don't but my jacks aren't very friendly when they are spawning and I didn't want to risk it. I can't imagine fry surviving in a tank with the babies. My jacks eat feeders that are much bigger than my 2 month old fry.
Do yourself a favor. Find out what you are going to do with the fry! They have hundreds of them!!! No one in my area takes them. And they don't breed once and stop. Every two months you can expect new fry! I have 70 from my first batch, they are about 2 months old, some are an inch long. They are in a 40 gal
tank so they are ok for a while, but I have to find somewhere for them to go and there is nowhere around here!!!! My second batch are a few weeks old I guess and it's about 300+ of them now. Some will die off they are tiny! Like little bugs. They are in a 20 gal
but I have to find somewhere larger for them soon. The size difference is too big between them and my first set so they can't live together right now.
One more thing!!! I told you I started with 4. The two that pair up are REALLYmean to the other two when they are spawning. I mean nearly killing them, and they try to jump out of the tank to get away from them. They don't allow them to move from a corner protecting the eggs! So I had to take them out, while they parented so that was another tank! And all the tanks of course have to have heaters and pumps so it has gotten very expensive and out of hand!!!!
I know I have given too much info but I wanted to share my experience with you it may save you some trouble!