GuppyGuppy Fish

Guppy Fry Growth Chart

Q. My guppy breeding is going really well and seem to have loads of pregnant females that will soon be dropping. What I want to know is when my female has her babies, which I’m not sure how many she will have to begin with as this is my first spawn with these females. How long does it take for guppy babies to grow and when can I safely put them into community tanks to live happily with my other fish without the fear that they will be eaten?

A. Hey, first off I would like to say congratulations on your pregnant females and one thing that I am very sure of and that is you will be having great fun over the coming months and throughout your guppy keeping hobby. Now with regards to question about guppy fry there are many different factors to take into consideration when answering, I run through them with you now to try and give you the most informed answer possible. The growth of guppy fry depends on many things like the temperature of the water they are kept in, the food they are being feed such as what type and their daily amount, the water quality and parameters and even the guppies genetics can control how quickly they grow. Trying to get your guppies to grow as quick as possible can be greatly helped through their feeding program, starting new born guppies on micro worms and freshly hatched brine shrimp will give them the greatest start in life to growing big, strong and healthy. Some professional guppy breeders follow a very strict feeding cycle and feed their guppy fry between 5-10 times a day in small amounts to maximize their growth, this system seems to be quite intense and not everyone as you can imagine can keep up with it but the more you can do the better. If you do try and feed to babies more often with smaller feeds make sure on the last feed of the day you siphon the tank removing any uneaten food to keep your water quality high. Below I have put together a rough guide growth chart for guppy fry but please do remember that this really is a rough guide, what I would suggest you do is when your guppies are born you keep your own records which is what many breeds do to keep track of everything. Don’t just take not of one females batch of fry you should really do it for multiply and them make your own average figures for your guppies, your tanks, your water parameters and your feeding schedule keeping note of all this at the same time for which you can then refer back to and see what promotes the best growth.

  • New born: 4 – 6 mm
  • 1 Week: 7 – 9 mm
  • 2 Weeks: 1 – 1.2 cm
  • 1 Month: 1.5 – 1.7 cm
  • 2 Months: 2 – 2.3 cm
  • 3 Months: 2.5 – 2.9 cm
  • 6 Months: 3 – 3.5 cm
  • Full grown: 3.5 – 4.5 cm

So there you have the guppy growth chart, one thing that you also need to remember is from what I have seen over time is that males grown a little faster but over time the females with be much bigger when fully grown. When it comes to putting your guppy fry back into a community tank with other fish all you really need to look at is the size of the fish’s mouths that you have in there and the size of the fry and make a judgment call. If they are being re-housed with other livebearers its usually quite safe to put them back in when they are about 1 – 1.5 cm.

 

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