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Page 7 about
Female Guppies
This page continues with Comments and Replies about Female Guppies. Click here now to go back to the previous page in this discussion about Guppies Info.

Customer Comments

I enjoy reading your website. Have a question regarding to one bad-behaved guppy.
I have a 29-gallon tank with 16 guppies, 6 ghost shrimps, 2 big bunches of Java Fern, and one bunch of Java Moss. The temperature is set to 78F. My guppies seem happy and have good appetites.
One female guppy (my daughter name her BrightTail) is pregnant and starts bad behavior today; she chases and nips other guppies that close to her. Last time, about 20 days ago, she had the same behavior, and gave birth next day.
I am wondering if you see this behavior before? And if this behavior is related to her pregnancy?
Thanks for your help,
Reply. Hello Ting. I enjoyed reading your comments. First let me complement you on your aquarium. I like the fact that it has 30-gallons of water, which is nice and big.

Next you have plenty of Guppies, which do better in a group with lots of Guppies rather than just a few. Also the Ghost Shrimp and the Java Ferns are good for Guppies and for Guppy babies.

So it surprises me that your female Guppy, BrightTail, chases and nips other Guppies. But her behavior shows that she has plenty of energy and is in excellent health, which is very good. Usually Guppy females do not chase and nip other fish, when they are in a big aquarium with lots of other Guppies.

I wonder if BrightTail might be hungry. Many types of fish become less aggressive and do less nipping, when they are well fed.

I would be sure to feed BrightTail a good flake food plus some Freeze Dried Blood Worms, which are really dried mosquito larvae, and I would feed her some live or frozen food like Live Black Worms or maybe frozen brine shrimp.

Click here for more about feeding fish, and click here for more about Live Black Worms.


Customer Comments

My question is "At what age are female guppies mature enough to reproduce?"
I have searched your site and found nothing exact about the age they need to be to reproduce.
I have four gupiies that are three months old (born on St. Patricks Day to be exact) and I'm pretty sure three of them are female and one is male (he's showing color whereas the others aren't) and it really appears that two of the females have little gravid spots in their bellies.
Also at what age or size is it safe for them to be put in with adult guppies? My adults are approximately 2 inches maybe more and the "teens" are about 1 inch.
Thank you for your time
Lori H.
Reply. Hello Lori. First congratulations on successfully breeding your Guppies.

The dark gravid spot on each of your young female Guppies is their babies! So they are already pregnant at an age of about three months!

Unlike mammals, all fish, including guppies, mature at a rate that varies with the water temperature, the amount of food, the variety of food, the quality of food, and other factors.

Since your females have matured and are pregnant at a very young age, I presume that you have fed them lots of good food and kept the water nice and warm.

If adult Guppies can catch baby Guppies, they will eat them. But after baby Guppies have about doubled in length from their size at birth, they can usually swim fast enough to avoid being eaten by the bigger fish.

So your young females can go back with the adults.


Customer Comments

I have a beautiful 35 gallon tall octagonal tank populated mostly with fancy tail guppies from your store.
I started out with 10 males and 7 females. I think the ratio is wrong since the males pester the females continuously. I would like to relocate some of the males to another community tank that I have. The community tank is a 40-gallon one containing neons, red velvet swords, a red tailed shark, a large pleco, a few white clouds and some tetras.
My questions:
What is the proper male to female ratio for guppies?
Would the community tank described above be suitable for some of the guppies ?
What steps should I take to move them from one environment to another?
Thank you,
Reply. Hello Sherry. As you observe in your aquarium, ten male Guppies with seven females is not a good ratio. The best ratio is at least three males and about twice as many females.

So three males and six females is good. You have a total of 17 Guppies, and if you had five males and twelve females, or even six males and eleven females, then it would be a better group.

Incidentally, mammals like me, my cat, and the dog, that lives next door, all have X and Y chromosomes, which create about 1/2 males and 1/2 females in each species of mammals.

But Guppies and other livebearing fish have X, Y, and Z chromosomes that produce about 1/3 males and 2/3 female Guppies. So the normal ratio for Guppies is two females for each male, and this may be the reason that this ratio works better in aquariums too.

You should be able to keep at least 25 Guppies in your 35-gallon aquarium. So you could get eight more females now to make a group with 10 males and 15 females, and that would make a much better group of Guppies.

So you don't need to move any of the Guppies to your other aquarium, which contains fish, like the Swordtails and Redtail Shark, that are definitely not compatible with the Guppies. Click here to read about compatible tank mates for Guppies.

Your Neon Tetra should be in a group with at least six Neons, and Neon Tetras are not compatible with the Swordtails or with the Redtail Shark. Click here for more about Neon Tetras and other small Tetras.

Incidentally, Swordtails are livebearers like your Guppies, and all livebearers live best in a group with at least three males and twice as many females. So you may need more Swordtails. Click here for more information about Swordtails.

Redtail Sharks, like yours, live best with only one in an aquarium or in a group with several Red Tails Sharks. I usually recommend at least six, but I've received several recent emails, that say it should be eight or more. So it's usually best to keep just one, like you have now. Click here for more information about Redtail Sharks.

Your White Clouds should also live in a group with six or more White Clouds, and they, like Neon Tetras, are compatible with Guppies but not with your Swordtails and your Red Tail Shark. Click here for more about White Clouds.

If you follow my recommendation and get eight more female Guppies and also add your Neon, plus five more Neons, plus six White Clouds to your 35-gallon aquarium, then all these new fish may produce too much more waste for your filter.

So you should add the eight females Guppies and move the one Neon to your 35-gallon aquarium, then in about three weeks get five more Neons, and move the White Clouds to your 35-gallon aquarium. Add White Clouds to make a group of at least six White Clouds.

You also asked about moving fish. It's best to freshen both aquariums before you move fish from one aquarium to another. To freshen an aquarium, do a partial water change by removing 20% of the water and replacing it with freshwater. Do this each day for three days before you move the fish.

Also be sure the temperatures of the water is within a few degrees. I think it is actually better if the aquarium receiving the fish has slightly warmer water. For example the fish may be in water at 77 degrees F., and they are moved to an aquarium with water at 79 degrees. So you might adjust your aquarium heaters during the three days that you are freshening the water.

I hope these comments help you and your fish.

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