Why Are My Endlers Not Breeding? {The Top 9 Ways You Can Help}

Are you noticing that your endlers are not breeding? Is this a defect, bad batch, water problem or just imcompatitiblity? In this article, we’ll run through multiple reasons why your endlers are not breeding.

Why Are My Endlers Not Breeding? Endlers mature as fast as 2 months. Sometimes the male is ready before the female endler and they cannot breed. Many times a pregnant female wishes not drop her fry unless water conditions are improved. A good birthing location and keeping away from aggressive tankmates are also be important. 

How Long Does It Take For Endlers To Breed?

Endlers are notorious breeders. It’s unfortunate that you are experiencing a delay or issue with your endlers not breeding. It should take an endler about 2 months to reach breeding maturity.

Sometimes the male matures faster and chases or harasses a female before she is ready. Her stress will rise and she may get weakened because of it. Add more females to your tank to decrease the harassment and increase the chance for breeding.

Should I Keep Only Endlers In A Tank?

Endlers are peaceful, nano sized fish that are still active and boisterous. They are small enough to be fearful of larger tankmates. If you wish for the ideal conditions to induce breeding, keep them separate from aggressive fish like cichlids or larger bettas.

You may also wish to keep guppies out of the tank. Guppies and endlers crossbreed and weaken the genepool of your endlers. There are already more hybrids than pure-bred endlers out there and we shouldn’t contribute to it.

Why Is My Female Endler Not Dropping Her Fry?

If you notice that your female endler has a sqaure shaped protruding belly, then you know she is pregnant. It’s best to make sure that she isn’t just bloated. She would be more rounded if she was and would need some peas to help pass what is causing the bloating.

If your female endler is not dropping her fry, it could mean the following:

  • Water chemistry is off
  • Uncomfortable with tankmates
  • Needs more isolation 
  • Wants a better location with plants
  • Tank is too small
  • Water is too cold

Water Chemistry

Your female endler may not wish to drop her fry if the water parameters are spiking, fluctuating or simply off. Check to make sure the reading on your next water test are close to the following:

  • Optimal Temperature 72 – 82 °F (22-28°C)
  • Optimal PH: 7.0 – 8.0
  • Optimal GH: 12 – 20 dGH
  • Nitrate: Less than 40ppm


Your endlers would be more comfortable in a tank without larger fish. They will need to hide more often. The distraction may cause them not to breed or the female will constantly search for a place away from larger tankmates.


This is good time to remove a pregnant female and place her in a breeding tank or breeder box. She might need the privacy to drop her fry. This is especially common when it’s her first time giving birth.


The plants provide adequate coverage against any threats when delivering a new fry. The female wishes to find the right spot deep in heavily planted areas. If you don’t have dense or bushy leaves, she may keep searching for the right spot.

Tank Size

1.5 endlers to 1 gallon of water is the general rule of thumb. You can fit up to 7 endlers in a 5 gallon tank, but you can’t expect them to breed and drop their fry in a tight space. Have a separate tank for breeding or get a larger tank if you plan to continue breeding endlers.

Water Temperature

Sometimes a fresh water change of warmer water ignites a female endler to finally drop her fry. Try this method with purified tap water that is warmer by a few degrees compared to your tank water. It has worked for our endlers and we hope it works for yours too.

YouTube video

How Can I Help My Endlers Breed?

There are many ways to help your endlers breed, but it is usually unnecessary. The joke is, “How do you get Endlers to breed?”

The answer is, “Just add water.”

The joke may be as dry as an empty tank, but it’s usually true. Endlers shouldn’t need our help. That doesn’t mean we can’t do something about it. Here are nine tips to consider:

1. Perform more water changes.

This helps to encourage breeding.

2. Remove larger fish.

They stress your nano fish and cause them to hide instead of breed.

3. Remove aggressors and bullies.

Endler bullies may stop the rest of them from breeding.

4. Place your endlers in breeding pairs.

Try a group of 3 or more breeding pairs

5. Remove a male and try a different breeding pair.

If you have 3 or more males, try a different combination.

6. Use a separate breeding tank.

It’s easier to create pairs on their own in separate tanks.

7. Add many more females.

More females helps calm the harassment from the males directed at only a few females. They also increase your chances of breeding.

8. Do a warm water surge.

Add in warmer water to heat things up between your females and males. It has worked often.

9. Raise the temperature.

The hotter the water, the more their activity rises. Be careful because their increased metabolism under high temperatures shouldn’t be sustained for long periods of time.

How Often Do Endlers Give Birth?

Endlers give birth as often as every 23-24 days. The water conditions and breeding pairs must be ideal to promote breeding frequency. An endler is ready to breed at about 2 months of age. They are livebearers and no eggs will need to be fertilized.

Neither endler parent will perform any parental duties after the fry is born. They are simply going to rely on us and themselves to quickly mature with enough food, sheltered areas or separate tanks to prevent being eaten or feeling stressed.


We hope your endlers start breeding soon. Make sure the female is at least 2 months old. Sometimes a congenial defect or a bad batch may lead to problems with breeding. We hope the information provided in this article is helpful to you.


Thanks for visiting HelpsUsFish.com and we hope to see you again soon for another article about Endlers or any other marine life you wish to know more about. 

Brian Arial

Brian Arial has kept fish for leisure and worked with fish stores for most of his life. He enjoys writing and caring for aquariums and ponds.

Recent Posts