Fry growth rates

Discussion in 'Breeding Fish' started by Nympxzie, Jul 20, 2015.

  1. NympxzieValued MemberMember

    This isn't news to many of you that fry raised in small tanks grow slow.

    Guppy fry born May 19th 2015 raised in 5g tank .35-.5 inches

    Guppy fry born July 15th 2015 raised in 20g long .35 inches

    Guppy newly born .15 inches

    Barely week old fry doubled in size as opposed to their 10 week old counterparts which took 10x as long to get to the same size!!! I;m hoping that by moving all 5g fry to the 20L I can have them all ready to go before September.
  2. ButterflyModeratorModerator Member

    It also depends on how your doing water changes. Nitrates build up faster in a small tank and Nitrates will make them grow slower.

  3. NympxzieValued MemberMember

    That's true! The 20 is newly cycled so I'm between 5-10 nitrate where as the 5 is probably 20-40 nitrate.
  4. ButterflyModeratorModerator Member

    yep those Nitrates are slowing down or even possibly stunting your fry growth rate.

    When I raised Angelfish fry I started out with a 10g tank because it was easier for them to find food. I did a 90% water change every night. After about a month they went to a 29g tank and significant water changes continued for another month. It's a hassle but it you under take breeding fish there are responsibilities that go with it.

    Good Luck!

  5. Dom90Fishlore VIPMember

    Hmm I have a 29g planned out for any Nyererei cichlid fry that I get later on, because I know bigger tank means faster growth... But am I going overboard?

    Sent from my iPhone using Fish Lore Aquarium Fish Forum
  6. NympxzieValued MemberMember

    If you're planning on raising more than 1 batch of fry, I'd say that's not overboard at all.
  7. Dom90Fishlore VIPMember

    Ok great! Then my plan in effect continues. Cycling should be done by tomorrow. But I'm told I won't see fry for 3-4 months since I still have juvies lol...

    Sent from my iPhone using Fish Lore Aquarium Fish Forum

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