Too many fry. Any advice please.

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Too many fry. Any advice please.

Postby MarkP » Fri Feb 08, 2013 1:34 pm

When I bought my first fish my lfs advised that I would not have any issues with hoards of new young fish. They said you need very near perfect conditions before any young are born and they will not survive without being separated into special fry tanks.

Ten days after purchasing my new platies and one has produced a small number of fry (3). Now 4 weeks on all 3 have survived and I am expecting them to reach maturity. This is great as a one off occurrence but I am afraid for the future. My lfs will not take any fry from me even free of charge.

I am now considering buying a small tank and segregating them so as I have one sex in my community tank and the opposite sex in my small tank. I have 4 females, 2 males and 3 unidentified fry. I understand that females may already be pregnant or could be retaining sperm to make themselves pregnant at a later date.

Does it make much odds which sex I keep in the community and which go in the smaller tank?
Is it okay to add more fish to the separate tank as and when new fry appear as I have heard that you should buy all of one species at a time because they will not be accepted by the shoal otherwise?

At the moment I have a 64 litre tank with just the platies in. I intend to add some pentazona barb and a couple of peacock gobies a while later. Perhaps my intended next fish would eat any new fry whilst they are still very young and my dilemma will resolve itself naturally?

Any comments or other ideas would be greatly appreciated. I don't really want to get an additional tank.

Thank you
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Re: Too many fry. Any advice please.

Postby Carylnz » Sat Feb 09, 2013 8:44 am

If you have live bearers they will reproduce every 4 - 6 weeks, even if conditions are far from perfect. You will have had more than those surviving but they will have been eaten.
The only way to ensure no more fry is to keep males only.
I would put the males in the smaller tank.
Some species are not so good at accepting newcomers but many don't mind.
Pentazona barbs need to be in a group of at least 5 and need 75L or bigger. They also need a good amount of length to swim in, at least 60cm.
My home forum is The NZ Fishroom http://www.fnzas.org.nz
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Re: Too many fry. Any advice please.

Postby chopper » Wed Feb 13, 2013 5:39 pm

buy a few tetra's they should keep them down. my x ray tetra's have had all mine from the last 3 batch's
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