Cherry Shrimp Molting Problems: How To Deal With Those?

Cherry Shrimp Molting Problems

Molting is a very natural phenomenon for cherry shrimps. It is a part of their growing process. However, if the conditions aren’t right, unsuccessful molting can occur. It poses a lot of problems for the shrimps, even death.

The most common and serious molting problem of cherry shrimp is called the ‘White Ring Of Death’. This is a very serious problem and often leads to the death of the shrimp.

In the rest of the article, I’ll discuss further the White Ring Of Death, its causes and solutions. I’ll also discuss some preventive measures against molting problems.

I have collected most of the information for this article from Michael has a fantastic blog over there and if you’re interested about breeding aquarium pets, you should definitely check that out!

White Ring Of Death: What Is It?

White Ring Of Death, as deadly the name sounds, its effects are deadly as well. This is just the sign of an unsuccessful molting.

During the molting process, cherry shrimps fill their shell with water until the exoskeleton bursts open. In case of a successful molting, the exoskeleton starts to open around the neck area. To be more specific, the area between the carapace and the first abdominal segment. After the crack, the shrimp bends itself in a U position and wriggles off the old exoskeleton.

During an unsuccessful molting, the shell doesn’t crack open around the neck area at only one point. Rather, the shell cracks across the whole neck, forming a circle of white. This white ring is the flesh of the shrimp. This white ring of flesh divides the old exoskeleton into two different parts.

At this stage, the U bending of the shrimp doesn’t help it to get rid of the old exoskeleton. In fact, most of the cases, the shrimp fails to move freely. This is mainly because of the light attaching of the exoskeleton to the shrimp body.

Imagine, you’re wearing a pair of gloves. Now, you’ve partially removed the gloves. In such a case, no matter how much you move the fingers, the gloves won’t come off. Such becomes the case for the cherry shrimp.

This is mainly the White Ring Of Death. Shrimps that face this problem try to get rid of the old shell for a couple of days. After that, the shrimp often dies. However, a very small percentage of the shrimps can get rid of the old shell.

So, don’t lose hope completely.

a shrimp tank setup with live plants
Owner: Ricky Sales

Probable Reasons Of White Ring of Death

Now that we know what is the White Ring of Death, it’s time to look at the probable reasons behind this tragic condition.

Is Too Much Protein Responsible?

Many people think that too much protein in the diet is responsible for this problem. This is because too much protein causes too frequent molting, which can lead to such problems.

However, I disagree with this. I don’t think the problem lies with protein. Yes, protein can be responsible for molting problems, but not directly.

Too much protein in the diet causes the cherry shrimps to grow fast. And we all know that molting is a part of the shrimp’s growth. So, when the growth rate is very fast, the shrimp often goes through many molting stages.

Molting itself is a very dangerous stage for any shrimp. So, if the shrimp has to go through a higher number of molting stages because of the higher growth rate, the more chances there are for failed moltings, or White Ring Of Death.

This is how protein can play in this scenario.

There are some more reasons why I think protein is not responsible for the White Ring Of Death.

Almost all the shrimp keepers around the world feed their shrimps a diet that contains about 40 to 47% protein. The same goes for shrimp researchers around the world. In fact, I follow many shrimp breeders that provide their shrimp a protein-based diet. No one has ever reported a problem. Because, protein is not the issue here.

In fact, the exoskeleton of the cherry shrimp contains mainly three elements:

  • Chitin (20-30%)
  • Protein (30-40%)
  • Calcium Carbonate (30-50%)

So, it can be undoubtedly seen that protein is fundamental for the shrimp’s growth. There is no need to point finger to protein alone for this molting problem.

However, the problem can lie in the diet. Shrimps need minerals, vitamins, and other nutrients to grow properly. Any lack of these nutrients can result in unsuccessful molting. That’s why I always offer my shrimps a good commercial shrimp food like Bacter AE or Aquatic Arts Sinking Pellets. These ensure my cherry shrimps are getting all the nutrients they require.

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Also, in such cases, blanched vegetables like blanched Kale can help a lot.

You can also try a vegetable-based diet to see if it brings any positive change to the molting problem. But, don’t continue it for too long as shrimps need protein to live. I’ve heard one shrimp keeper continued a vegetable-based diet for too long. In the end, the shrimps turned cannibalistic for the source of protein.

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Too Large or Too often Water Change

Some shrimp keepers think the White Ring Of Death can result from too much or too frequent water changes. I agree with these. If you are performing too much water change, the water parameters will become unstable.

Also, too frequent water changes will keep the water parameters out of their ideal range for cherry shrimps. It can start to pose a lot of problems for the cherry shrimps. Change in the water parameters can force the cherry shrimp to go through a molting stage which can turn out to be unsuccessful.

a berried blue cherry shrimp with eggs
Owner: Natalie Skinner

Imbalance Between pH and Calcium

Let me talk about a recent study that was performed by a group of researchers. A colony of shrimps was kept in a low pH environment for 21 days. After the 21 days, it was observed that the exoskeleton of the shrimps had no visible difference.

However, the calcium content of the shell spiked high. That means, the Calcium to Magnesium ratio in the shell shot up. This study proved that in a low pH environment, the calcium content of the shrimps gets high. This high calcification can change many other physiological aspects of the shrimps.

As the shell has a higher quantity of calcium, it starts to get denser. A dense shell is harder to molt than a normal shell.

Affect of GH

GH stands for General Hardness. It measures the amount of Magnesium and Calcium in the water along with some other minerals.

GH is very important for cherry shrimps because it indicates the level of Calcium Carbonate in the water. Calcium Carbonate is extremely important for shrimps to molt because the calcium is necessary for a strong exoskeleton.

Among the total calcium need for the new exoskeleton, about 25% of the calcium will be absorbed from the old exoskeleton. The rest will be absorbed from the water column.

Also, let us not forget about Magnesium. It helps the shrimps to absorb calcium carbonate and form the new exoskeleton.

If the GH gets too low, the cherry shrimps will face a harder to molt and form a new healthy exoskeleton. As a result, the shrimps keep exposed to danger for a longer amount of time. On the other hand, too much calcium carbonate in the water can also pose some other problems.

Low Calcium vs High Calcium

It is known that calcium sulfate helps to stabilize the pH in the aquarium water. That’s why many aquarium products use calcium sulfate. However, there is a downside to using calcium sulfate.

By using calcium sulfate, the amount of calcium in the water gets too high. As a result, The GH reading spiles high. In such a case, the exoskeleton of the shrimp gets too rigid and difficult to molt. So, the shrimp spends more energy to molt which can cause stress and eventually, death.

On the contrary, if there is very little calcium in the water, the shell of the shrimp won’t get firm. It will remain very flexible. As a result, the old exoskeleton might not break apart at any point in the shrimp’s body or the underneath layer of the exoskeleton can get too weak.

This causes the shrimp to stress and die shortly after a molting or any other change.

If your shrimp tank has soft water, meaning the amount of calcium is on the lower side, you can use cuttlebones instead of calcium blocks. Calcium blocks can cause too much calcium to be absorbed in the water. A more subtle and safer approach is to use cuttlebones.


In addressing the dreaded White Ring Of Death, it’s crucial to remember Abhisek Mallick’s advice:

‘There is no treatment for shrimps once issues arise, making proactive care essential. Avoid insecticides near the tank and be cautious with substances like active soil and Indian almond leaves that can lower pH levels dangerously.’

With this in mind, let’s explore some effective preventive measures and solutions I’ve found on the Internet:

Blanched Vegetables

A balanced diet is the key to get successful molting. Cherry Shrimps love to graze on Algae and Biofilm. However, they also need a specific set of nutrient which you can’t get from algae.

If your shrimps are having problems with molting, then a great natural trick will be to feed them blanched Kale. Kale is very rich in minerals, vitamin, and other nutrients. Also, shrimps love to graze on blanched kale.

I also provide blanched cucumber and zucchini to my shrimps. They love to graze on these too! Always keep the diet interesting to make sure your cherry shrimps are attracted to the food.

amano shrimp and blue cherry shrimp feeding on cucumber
Owner: Natalie Skinner

Crushed Egg Shells

For successful molting and proper growth of the new exoskeleton, shrimps need calcium in the water. If there is no calcium supplement nearby, you can follow this great hack.

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Take some eggshell. Wash the shells thoroughly. Now take a baking tray and place the eggshells. After that, bake the eggshells for about a few minutes so that all the bacteria leave the shell.

Now, place the eggshells in a mortar and pestle and crush them until they get a powder-like consistency. Feed this crushed eggshell only about a pinch amount to your shrimps. You can store the crushed eggshells in a pot.

If you are on a tight budget or your local fish store doesn’t have any calcium supplements, this little trick will come in handy a lot.

Don’t Take Things Into Your Own Hands

When cherry shrimps suffer from molting problem, it can get very tough for the owner to bear that. So, many beginners want to help out the shrimp manually. Though helping your shrimp may sound wonderful and all, it is actually putting the shrimp’s life more at risk.

Shrimps are very delicate creatures. No matter how much careful you are, there is always a chance of you crushing the shrimp’s legs or carapace, which even makes the shrimps more miserable.

So, no matter how much experienced you are, unless you are not a doctor specialized for shrimps, I’ll not recommend to help the shrimps when they are having trouble with molting. Without doing that, you can ask for a professional vet’s help. He should be able to do something for your shrimp.

Just keep your hopes up and let nature do its job.

Preventions Against Molting Problem

  • Refrain from too often and too much water changes. Both can bring a serious change in the water parameters, which can stress out the shrimps. Normally I follow a weekly water changing schedule when every week I change about 25% water.
  • Each species of shrimps have their own preferable range of water parameters. For cherry shrimps, make sure the water parameters are suitable for them so that they don’t get stressed.
  • If the water is too soft, you can use cuttlebones which will subtly increase the calcium in the water.
  • Make sure the diet contains all the nutrients required for cherry shrimps. Shrimps need algae, biofilm, blanched vegetables as well as sa commercial shrimp food for a healthy life. If your shrimps are having molting problems, make sure the diet is providing enough nutrients to them.
red and yellow cherry shrimp on snail
Owner: Maryanne Young

Renowned shrimp expert Abhisek Mallick highlights common beginner mistakes in shrimp keeping, such as not cycling aquariums properly and ignoring species-specific water parameters.

Aligning with his insights, the article underscores the critical role of a balanced diet and stable water conditions in preventing molting issues like the White Ring of Death.

Mallick’s emphasis on the importance of quarantine and avoiding mixing shrimp with fish further complements the article’s focus on ensuring a safe and conducive environment for cherry shrimp molting.

How To Help Shrimp Stuck In Molt?

Molting is such a vulnerable process in the life of shrimp, where shrimp can face death. In worst cases, your shrimp may face the White Ring of Death. Your shrimp will suffer the worst if it sticks in the molt.

Shrimp hobbyists often want to know the ways of helping shrimp stuck in molt. But, unfortunately, there are no ways to comfort your shrimp that’s stuck in molt. The stuck shrimp often make themselves free from the broken shell.

For this, the shrimp need to be healthy and fit. If shrimp do not set themselves free by themselves, your shrimp may die.

Some shrimp owners try to recover their stuck shrimp with tweezers. There are several records of success in applying manual methods. But, these manual methods are life-risky for shrimp. While pinching the shell with a tweezer, you might hurt your shrimp.

Since shrimp have a soft body, you might kill your shrimp incautiously. That’s why you need to leave these tricky situations for luck. To prevent such a dreadful situation, you can keep the water parameters ideal.

Besides, you should focus on the diet and nutrition of your shrimp. Do not make the mistake of doing a big water change. Keeping the tank environment good can save your shrimp from sticking in broken old shells.

How Often Do Cherry Shrimp Molt?

The molting frequency varies according to the shrimp species, age, environmental conditions, etc. Certain components can trigger the molting frequency. In cases of cherry shrimp, you can experience to notice their molting every 3-6 weeks.

If your cherry shrimp is an adult, it’ll molt every 3-4 weeks. In the case of younger cherry shrimp, the molting frequency is more than that of adult shrimp. Since the growth rate is faster among young cherry shrimp, they shed their exoskeleton every 1-2 weeks.

To help your cherry shrimp molt, you must keep the water parameters ideal. Otherwise, your cherry shrimp may die while molting.

Is Shrimp Molting A Good Sign?

If you’re a beginner, you may not know much about shrimp molting. So, a serious question may pop up in your mind- is shrimp molting a good sign?

Before understanding whether molting is a good or bad sign, you should know why molting happens to shrimp.

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Molting is a natural process that symbolizes the growth of shrimp. When shrimp grow with age, their size increases gradually. But, the exoskeleton of shrimp is a rigid and stiff structure.

Although the shrimp size increases, the exoskeleton doesn’t increase with the shrimp body. As a result, shrimp require a new shell to fit in their increased body. That’s why molting is a must in the lives of shrimp.

So, you can consider molting as a good sign. Frequent molting is a sign that your shrimp are healthy. Also, your shrimp must have good growth.

However, the shrimp tank must have good water condition for their molting. If your shrimp experience regular molting, the water quality must be alright.

Moreover, shrimp tend to mate after molting. That’s why you can consider molting a prosperous sign. After all, your shrimp number will get multiple after molting.

Why Do Shrimp Molt?

You might know that the exoskeleton works like a protective barrier for shrimp. But, this rigid shell does not grow along with the size of shrimp. On the contrary, shrimp can not survive without their exoskeleton.

Hence, there’s a natural process to get a new shell for shrimp called molting. Shrimp tend to shed their exoskeleton through this vulnerable process of molting.

Generally, the young shrimp molts frequently since they grow faster. It can take a few hours to weeks.

After shedding the exoskeleton, the shrimp remain soft and sensitive in the post-molting stage. It can take a few days to harden the new skin of shrimp. During this period, shrimp hide themselves to save from predators until they grow new exoskeletons.

red yellow shrimp feeding dish
Owner: Maryanne Young

Frequently Asked Questions

Do shrimps eat their molt?

Shrimps do eat their molt as it is a rich source of calcium and other minerals. That’s why it is recommended to leave the molted exoskeleton in the tank and not take it out.

How often do neocaridina shrimp molt?

Neocaridina shrimp molt every 3 to 4 weeks in healthy conditions, but younger shrimp will molt more often due to how fast they grow, perhaps every 1 or 2 weeks.

What does a shrimp molt look like?

A shrimp molt looks like a translucent, empty exoskeleton of the shrimp that has shed it. The size of the molt will depend on the size of the shrimp that molted, and it may be difficult to differentiate between a molt and a dead shrimp.

However, a molt will look whitish & translucent, while a dead shrimp will turn opaque, milky, or pinkish in color.

How long does molting last in cherry shrimp?

Molting in cherry shrimp usually lasts for a few hours to half a day, with the actual shedding process taking around 30 minutes to an hour. After molting, the shrimp’s new shell will be soft and pliable, and it will take a few days for it to harden completely.

How do you know if cherry shrimp is molting?

You can tell if a cherry shrimp is molting if it is exhibiting certain behaviors such as hiding or being inactive, or if it is lying on its side or upside down. You may also notice a white, cloudy substance around the shrimp, which is a sign that it is preparing to molt.

During the actual molting process, the shrimp will shed its old exoskeleton, which will appear as a translucent, empty shell in the aquarium.

What does it mean when cherry shrimp molt?

When cherry shrimp molt, it means that they are shedding their old exoskeleton in order to grow a new, larger one. Molting is a natural process that allows shrimp to grow and develop properly.

During molting, the shrimp will shed its old exoskeleton and remain hidden until its new shell hardens. Molting is a sign of a healthy shrimp, and it is a necessary process for the shrimp to continue growing and thriving in the aquarium.

How long do shrimp hide after molting?

Shrimp will typically hide for a few hours to a day after molting. During this time, their new exoskeleton is still soft and vulnerable, so they will hide to avoid being attacked or eaten by other tank inhabitants.

After a day or so, the shrimp will become more active and visible as their new exoskeleton hardens.

Why is my shrimp molting in new tank?

It is normal for shrimp to molt in a new tank because molting is a natural process that allows them to grow and develop properly, and the stress of being moved to a new environment can also trigger molting.

Additionally, the water parameters in a new tank may be different from the previous tank, which can also trigger molting.

As long as the shrimp is otherwise healthy and active, molting in a new tank is not a cause for concern.


So, this is my detailed guide on cherry shrimp molting problems. Though the White Ring Of Death is not that common, it can happen. And if it happens, there is very little to do to save your shrimp.

So, look out for the reasons that cause this problem in the first place. Also, follow the preventive measures mentioned in the article.

We all know, prevention is better than cure.

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Muntaseer Rahman

About Author

Hello, I’m Muntaseer Rahman, the owner of I’m passionate about aquarium pets like shrimps, snails, crabs, and crayfish. I’ve created this website to share my expertise and help you provide better care for these amazing pets.


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