Rose Danio (Danio roseus): Ultimate Care Guide

If you live in an apartment, dorm room, or just a small living space, you likely already know that many pets aren’t a great option for you. You’re also likely to believe that your limited space may not allow you to own fish or an aquarium. But it is, in fact, very possible to own an aquarium or a tank in a small living space. If you decide to invest in a small tank, you will need small fish that will fit comfortably in your tank. A Rose Danio is the perfect choice for these smaller tanks.

First described in the year 2000, Rose Danios can be found in freshwater all across Asia, specifically in China, Laos, Myanmar, and Thailand. As their name suggests, the Rose Danio has a pink hue across most of its body. Across the world, the Rose Danio is known by other names, such as the Rosy Danio or Purple Passion Danio. Regardless of what name you know them as, the Rose Danio is the perfect choice for a freshwater nano tank. They are the ideal choice because of their small size; when fully grown, the Rose Danio reaches a length of just around 1.5 inches.

Rose Danio
Rose Danio. Edited. I, Lerdsuwa, CC BY-SA 3.0

Rose Danio Care

Before purchasing any pet, especially fish, you need to understand the care they will require. The small size of the Rose Danio may lead one to believe that they require little to no maintenance; that is obviously not the case. You need to ensure that your tank is set up properly for caring for these small yet gorgeous creatures. It is also imperative that you keep an eye on water parameters to ensure that they do not fluctuate. Doing this can help keep your fish healthy and happy while giving them the best chance at a long life.

Are Rose Danio easy to care for?

Caring for Rose Danios is not very difficult. They have no outlandish requirements to speak of. They also can tolerate a wide variety of tank and water conditions which could make them a great choice for community tanks. The main concern with caring for Rose Danios is that they are a shoaling species, which means that you should always keep them in a group of at least eight. It will take just a bit of research to care for your Rose Danios. These gorgeous fish will reward you for putting in the effort.


Temperature is an important parameter of any tank. However, it is sometimes overlooked, especially in nano tanks. Despite being ignored by some, you should ensure that your tank’s temperature stays within the recommended range for the fish in your tank. If you have a tank that contains just Rose Danios, you should always keep your temperature between 68 to 79 degrees Fahrenheit or 20 to 26 degrees Celsius. Keeping the temperature within that range will help emulate the native environment of your Rose Danios. Emulating their endemic home will help keep the fish both happy and healthy.

Water pH

Regardless of the size of your tank, or the species contained within, it is imperative that you routinely check your water parameters. Doing so can help ensure that you catch any changes to your pH levels. Some inexperienced Aquarists may not realize how impactful pH changes can be. A single change in your pH can change the entire chemistry of your tank and will negatively impact the species in your tank. If your tank contains any Rose Danios, your pH level should remain between 6.0 to 7.5.

Rose Danio Size

Rose Danios are the perfect choice for nano tanks because of their minuscule size when fully grown. On average, a fully grown Rose Danio will reach just around 1.5 inches in length. That small size also makes them the perfect shoaling species. You can comfortably fit many of these small fish into a small tank.

Food and Diet

Rose Danios are omnivores in the wild, meaning they eat plant and animal matter. However, they will easily accept high-quality flakes or pellets when kept in captivity. While not mandatory, you can supplement the diet of your Rose Danio with live or frozen foods such as bloodworms or tubifex. Supplementing your Rose Danio’s diet can benefit their health, but it is worth noting that bloodworms may cause blockage issues in some fish.

Rose Danio Lifespan

The lifespan of any fish is mostly dependent on the care they receive. On average, a Rose Danio will live between 3 to 5 years. That number can plummet if your Rose Danio is neglected or not given the care they deserve.

Tank Size

A single Rose Danio could be kept in a very small tank, and they would be comfortable. However, it would be best if you kept your Rose Danio in a group. If kept in a group of around 6, 20 gallons in volume is the perfect size tank for Rose Danios. You should aim for a tank that is somewhat longer since the fish like to swim and are used to rivers.

Tank Setup

When setting up a tank, you want to ensure that you emulate the native habitat of your fish. Rose Danios are endemic to rivers, meaning you want to make sure that your tank is well-planted with plenty of water flow. It would help if you also used a darker substrate, preferably made of gravel.


The first step towards breeding Rose Danio is to sex them. Female Rose Danios are slightly larger than their male counterparts while having wider bodies that are duller in color. Breeding Rose Danios is very easy and will likely happen on its own. Rose Danios tend to lay their eggs into available plant matter, such as Java Moss. Once the eggs are laid, you should remove the parents. Around a day after being laid, the eggs will hatch.


Disease can be an issue for any fish kept in captivity. The best way to avoid disease is to keep your tank clean and your water parameters in check. However, there is still a chance of your Rose Danio getting any number of diseases. Some common diseases affecting Rose Danios are Mycobacteriosis, Velvet, and Ich. Catching any illness early is the best way to heal them.

Where can I find Rose Danio for sale?

Rose Danios are very small and extremely popular, so your local pet or aquarium specialty store will likely carry them. However, if they don’t, you can easily find them for sale online. If you purchase them online, be sure that you trust the retailer. On average, a group of 8 Rose Danios can be found for around $25. While a single Rose Danio can be purchased for approximately $3.

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