Can Molly Fish Live in an Outdoor Pond? {6 Things You Need To Know}

Are you wondering if you can keep your molly fish in an outdoor pond? Will your molly survive in an outdoor pond?

In this article, we will discuss everything related to keeping mollies in an outdoor pond.

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Can Molly Fish Live in an Outdoor Pond?

Yes, you can keep your mollies in an outdoor pond as they are hardy freshwater fish. They can adapt to various water parameters but should be kept in water temperature between 68-82 Fahrenheit.

Therefore, keeping your mollies in a pond is ideal in summers instead of winters.

Can Molly Fish Live in an Outdoor Pond

Now that you know that you can keep mollies in an outdoor pond, you might look at some tips to ensure that your molly survives in a pond. Let’s start!

Tips to Keep Molly Fish in Pond

Although you can keep a molly fish in a pond, you need to take certain precautions to keep it safe in an outdoor pond. Below are some tips you can follow to keep mollies in a pond.

1. Use Water Filters

Just like you need to keep the water in the aquarium clean, there’s a need to maintain clean water in the outdoor pond. Use suitable water filters for ponds to ensure that the pond water is free from impurities.

2. Maintain Proper Aeration

Adequate oxygen supply inside the pond is extremely important for keeping your mollies healthy. Try installing a cost-efficient aeration system to increase the water supply in the pond. You can also put aquatic plants in the pond for better aeration.

3. Use Water Heaters

If you don’t live in a tropical region, it’s recommended that you use a water heater for your outdoor pond. Your mollies might fall sick if the water temperature is too low.

Take Note: Avoid keeping your mollies in an outdoor pond in winters.

4. Proper Shade

If you live in a region where water can get heated up during the daytime, make sure you have made proper provisions for shade.

5. Run Regular Water Checks

You need to regularly check the pond for its water condition. Optimal water conditions are necessary for your mollies, no matter whether you keep them in an aquarium or an outdoor pond. Mollies need a pH level between 7-8 and 0 ammonia levels for their safe survival.

6. Don’t Let the Debris Accumulate

Clean your pond manually to remove plant waste, mud, fish, food, rocks, and other debris from the pond. Consider using a pond vacuum if the waste is hard to reach to prevent the growth of algae, fungi, and bacteria.

More tips in the video below

YouTube video

Are Mollies Cold Water Fish?

No, mollies are not cold water fishes. They are native to a tropical climate, and you need to keep them in water temperatures between the ranges of 72-82 Fahrenheit.

Can Molly Fish Survive Winter in a Pond?

Mollies are hardy fishes,
and they can and survive winter in a pond. However, keeping mollies in an outdoor pond in winters is not ideal, and you should avoid it. Exposing your mollies to extremely cold water can make them fall sick.

Will They Breed?

No, mollies do not breed in reproduce or breed when they are kept in cold water in winters. You need to maintain adequate water temperatures to let your mollies reproduce. Breeding molies prefer a water temperature of 80 Fahrenheit or slightly more.

What Temperature Is Too Cold for Mollies?

Temperature below 68 Fahrenheit is too cold for mollies. Ideally, you shouldn’t let the water drop below 70 Fahrenheit. Mollies can catch a cold easily. They start losing interest in the food and sink at the bottom of the pond if they catch a cold.

Can Molly Fish Survive Being Frozen?

No, molly fishes cannot survive being frozen. As discussed earlier, mollies are tropical fishes that need warm water temperatures to survive and stay healthy.

A slight drop in water temperature might still be bearable for them but not freezing cold water. As a result, they are likely to die if frozen.



Hello, I'm Jason. I'm the guy behind I volunteer at my local fish shop and I created this site to offer tips and advice on the fish I care for.