The issue of controlling guppy breeding can be a little tricky for new and experienced aquarium owners alike.
For those who don’t want to deal with fry, there are many ways that you could go about it – from making sure your water quality is perfect all the way up until birth so they never swim outside their parents’ protective bubble or even adding some type of medication into each prospective breeder’s diet (although this last option should only ever happen after serious consideration).
If you’re interested in keeping guppies as pets, you may be wondering how to stop them from breeding. Guppies are livebearers, meaning they give birth to live young instead of laying eggs. This can make it difficult to control their population if you’re not careful.

How To Stop Guppies From Breeding
Remove The Males From The Tank
One way to stop guppies from breeding is to remove the males from the tank. Guppies are polygynous, meaning that one male can mate with multiple females. This means that as long as there is at least one male guppy in the tank, the females will continue to breed.
Keep Only Female Guppies
With the trend of keeping only female guppies, aquarium enthusiasts will oftentimes choose to do so. The reasoning behind this practice is that males can look better than females due to their larger size and more vibrant coloration a preference most find appealing in an ornamental fish tank setting where appearance matters above all else.
If you want to create a home for female fish only, remove any male counterparts from your tank. When doing this be especially mindful of where they might hide in decorations or among plants so that these unwanted fries don’t end up stuck near them!
Use A Physical Barrier
Another way to stop guppies from breeding is to use a physical barrier. This can be something as simple as placing a piece of mesh over the top of the tank. This will prevent the guppies from getting to each other to mate.
You can also use chemical barriers to stop guppies from breeding. There are a few different products on the market that are designed to do this. You can also use some of the chemicals used in pond or aquarium treatments, as long as they are safe for your specific type of fish.
Any of these methods should be enough to help you control the breeding of guppies. Just remember to be consistent and continue using them over time if necessary.
What Are the Differences Between Guppy Genders?
With the ways you can stop guppy fish from overbreeding now revealed, one key step is knowing the difference between males and females.
Guppies are a common aquarium fish. They are easy to care for and come in all kinds of vibrant colors, which makes them popular pet fish among both beginners and experienced fish keepers. Like any other type of fish, you want to make sure you’re properly identifying your guppies’ genders before adding them to the tank or breeding them. Here are some tips on how to tell the difference between a male and female guppy:
- Look At Their Shapes
Male guppies tend to have longer, slimmer bodies than females, while females are often rounder in shape and may resemble a small ball when full of eggs. If you look closely at your guppies from above, you should be able to see this difference.
- Inspect Their Fins
Male guppies have much longer and more colorful fins than females, who usually have shorter, less elaborate fins. The males’ long fins help them attract mates and may also make it difficult for predators to grab them.
- Check For A Gravid Spot
The gravid spot is a black mark around the vent of female guppies. This area darkens when the female is full of eggs and ready to breed. This gravid Spot is absent in male guppies.
- Look For Egg Spots
In addition to the gravid spot, female guppies may also have small white spots on their fins, which are actually eggs. Male guppies will not have these egg spots.
- Compare Their Sizes
In general, male guppies are smaller than females. This is because the males don’t need to be as big to carry the eggs and protect the young fry.
- Watch Their Behavior
In general, female guppies are shyer and more peaceful than males, who tend to be much more active and aggressive. If your guppies seem particularly timid or constantly fighting with each other, you may have a male and female on your hands.
If you’re serious about raising and breeding guppies, it’s a good idea to keep multiple males and females in order to increase your chances of getting pregnant fish. And with these tips in mind, you should be able to successfully identify the genders and breed your own guppies.
What to Do with Unwanted Guppy Fry?
It can be difficult to find good homes for all of your guppy fries, and sometimes you may end up with more than you know what to do with. If this is the case, there are a few options available to you.
- One option is to simply donate the fry to a local pet store or aquarium. This way, you can be sure that they will find good homes and be well cared for.
- Another option is to sell the fry online or at a local fish store. This can be a great way to make some extra money, and it will also help to ensure that the fry finds good homes.
- Finally, you can always keep the fry yourself. This may be a good option if you have extra room and the fry is a specific color or type that you want to keep.
No matter what you choose to do with your unwanted guppy fry, there are plenty of options available to ensure that they find good homes.