Can You Keep Mollies With Discus? {Will They Get On}

Have you ever tried putting together a Molly and Discus? Do you think they will get along?

In this article, I will be providing you with vital information about both the Molly and Discus fish and if they are compatible together.

Most hobbyists like to pair different fish together, but it is essential to check how compatible they are.

Can You Keep Mollies With Discus? Yes, Mollies and discus make good tank mates as they are both peaceful fish that share similar water conditions.

Keep Mollies With Discus

Will They Get On?

This is a crucial point to consider when adding a new fish to your aquarium. Some fish are aggressive, while some are calm and timid.

You definitely wouldn’t want to pair these two fish together. The similarities between the two fish have to overshadow their differences for them to be compatible.

Molly and Discus fish do have a little in common, but their differences are more evident. The Molly and Discus are beautiful fish that come in different colors and are easy to keep.

Thou, the Discus fish, isn’t the best option for beginners because they have strict water quality; the molly, on the other hand, can adapt to various conditions.

Mollies sometimes tend to harass the Discus, or maybe the other way around, the Discus will be aggressive towards the Molly fish. Because of their differences, they may not get along. It will be best not to pair them together; instead, both can be paired with the Angle fish.

Will They Fight?

The Molly and Discus fish are calm and timid; they hide away behind plants or decorations. But both can also be aggressive. The wild-caught Discus can be hard to handle and sometimes aggressive. This is why you should keep a shy fish with them.

The Male Molly tends to harass the Discus, making them feel uncomfortable and go into hiding.

Environmental Needs

Next lets take a look at the aquarium needs of both fish;


There is undoubtedly essential information you need to know about them before acquiring one—things to consider include; Water Conditions, the tank setup, and Compatible Tankmates.

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Required Water Conditions

Every fish has its water requirements. Mollies require hard water (15-30 dGH) with higher pH levels (7.0-8.0). Some fish can adapt to various water conditions, either hard or soft water. But the Molly fish aren’t able to adapt to soft water. If you are to place them in soft water, then you need to add more minerals.

Required Tank Setup

When setting up a tank, you don’t need to worry about having separate tanks for different Mollies. They can all be put in similar environments. Set up the aquarium with a sandy substrate layer along the bottom of the tank. They can find grains, while at the bottom, it’s also an excellent place to keep plants and ornaments like rocks.

You can choose whatever plants you like, but taller options like Anubias Nana are good choices; they make good shelters for Mollies. It is good to have multiple plants and decorations that can serve as hiding places for the fish since they tend to do a lot of hiding when they are shy, scared, or pregnant.

Tank Mates

Mollies are peaceful fish and are easy to handle. They will go great with other delicate fish. They wouldn’t like to be paired up with aggressive fish like barbs or betta. Or even paired with large fish, they might eat up your molly fish.

Pair Molly fish with Guppy fish, swordtail, platy, Neon tetras, Zebra Dano, Minnows, Plecos, Gouramis, Angelfish, etc.


Discus is calm and can also be very shy; they come in various beautiful beautiful colors. They can easily be stressed out by aggressive, territorial, hyperactive tank mates. Due to their unique shape, behavior, and cool colors and patterns, Discus is popular.

YouTube video

A discus isn’t so exhausting to keep; you need to meet specific requirements. To keep a discus, you need to consider certain things such as; Water Conditions, the tank setup, and Compatible Tankmates.

Required Water Conditions

Unlike other fish that will adapt to any water condition, the Discus has strict water conditions to be followed. It prefers soft, acidic, and warm water that has a pH above 5.0 and below 8.0. 1°-4° dKH is a good figure for the hardness of the water. Also, keep it at a comfortable temperature above 80, but not exceeding 87° Fahrenheit.

To keep the water at the proper temperature, use an aquarium heater. Keep the Captive-bred Discus, on the other hand, tap water that is dechlorinated. Discus needs pristine water quality, with a 15 -30% weekly water change. You could use Aqueon for water changes in the aquarium.

Required Tank Setup

There are many fish tanks to choose from at the market, but when it comes to the Discus, always consider the shape of the tank.

The tank should promote optimal filtration, which will also reduce the movement of water. Place the tank between 1 and 1.2 meters above the ground. Placing the tank high up makes the Discus feel secured.

It would be best to consider putting plants and decorations like rocks to make caves where they can hide or play.

Compatible Tankmates

Whichever type of fish you add to your discus fish tank, make sure they can comply with the discus condition, not the other way around. It would be best if you were extra cautious when choosing a companion for your Discus. Avoid too many companions for a discus tank. The number of fish in a group shouldn’t be more than five in the tank. But it also depends on the size of your fish tank.

Examples of compatible fish with Discus include; Characins, dwarf cichlids, Gouramis, clown loaches, Rasboras, Rainbowfish, and similar fish like the Discus.


Molly and Discus have a few similarities, but the differences between them are more evident. Thou they are both calm, shy and peaceful fish. They can’t stay under the same conditions; it makes them incompatible with each other. Other fish would be good companions for both molly and Discus, as the Angelfish.


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.

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