Will Hydrogen Peroxide Kill Shrimp?

I’ve discovered that spot treatments applied with an eyedropper or syringe are effective, particularly when applied to a high-light setup with CO2 in the middle of the day. The algae “explode” effectively during conditions of maximum growth because they are unable to block the absorption of additional oxygen.

As Apista advised, use no more than 3mL per gallon, and I would apply it with an eyedropper while submerging the troublesome spots. The following day, my algae would be an orange-yellow, and I would then perform a WC. Within three days, the algae (in my case, hair algae developing in my mosses) would go. There is some trial and error involved in this, so test it on one troublesome area first, if feasible. Too much will either brown out or kill your mosses.

Instead of treating the entire tank at once, you should do so over the course of a few days. Although it is a discomfort, it prevents you from going overboard. I would treat my tank in “quarters” over the course of four days.

However, I wouldn’t “dump” peroxide into a tank! That would err on the side of “extreme,” and your shrimp might perish as a result. Remember that as bubbles appear, the peroxide is reacting and changing into H2O and O2. Peroxide is safe for plants, fish, and invertebrates at low doses. Too much at once can suffocate invertebrates and fish by getting into their gills, or if they’re feeding, it can enter into their digestive systems and, well, kill them that way. Both your bacterial populations and your plants can perish from too much H2O2. Don’t overuse peroxide and ruin your entire tank because of some insignificant algae. When using this kind of algae killer, patience is key.


Because it oxidizes things, hydrogen peroxide works. If the water contains a lot of organic substances, they will oxidize and disappear rather quickly. If the RO water is essentially pure, the only thing the hydrogen peroxide may oxidize in the tank are the organic living things. This applies to all living things, such as plants, snails, fish, shrimp, etc.

Therefore, the water itself affects the outcome. Unsurprisingly, using hydrogen peroxide seems to be safer in dirty water than in really pure water. If not safer, at least with higher doses.


Hydrogen peroxide was always fine when I put it in the shrimp tank. Sometimes the tank contained only a few tiny oxygen bubbles and no dead shrimp.

It is likely that you added too much hydrogen peroxide because the moss died. Moss can sustain minor damage but should recover.

By alone, hydrogen peroxide can be problematic. However, after using it, a water change should be made within a few hours and the next day. This is due to the fact that dead algae creates a lot of nitrites, which is a problem in and of itself.

Will my fish die if I use hydrogen peroxide?

The amount of hydrogen peroxide you should use to thoroughly clean your aquarium is subject to a wide range of sources and viewpoints.

While some prefer to go crazy and use as much as 20 ml per gallon of water, others only use 0.5 ml.

It’s critical to accurately estimate the amount of hydrogen peroxide used. The market offers a variety of hydrogen peroxide concentrations. These range from 1% to 90% and are used as rocket fuels. 3% hydrogen peroxide solution is the most widely used concentration.

The acceptable concentration of hydrogen peroxide is 1 milliliter of 3% hydrogen peroxide solution per gallon of water. Additionally, after introducing the chemical, you must perform a large water change.

Different algal infestations call for varying hydrogen peroxide concentrations. However, you shouldn’t use more than 1.5 cc per gallon of water if you’re feeling a little queasy.

The objective is to get rid of nasty parasites while preserving the aquarium’s ecosystem. In aquariums, too much hydrogen peroxide can destroy beneficial microorganisms that create oxygen, nitrogen, and other vital nutrients for fish. Long-term harm from a lack of nutrients and oxygen can be done to animals.

My corals: Will hydrogen peroxide harm them?

If all else fails, dump the tank and simply apply hydrogen peroxide directly to the algae patches to kill them. Yes, the same material that is used to treat a tiny cut or scraped knee. You can purchase it in a spray bottle at a drugstore, spray it directly on the algae, and then wait a short while before refilling the tank.

Even when applied directly to the tissue, many corals tolerate the peroxide. Some reefers dip coral frags in peroxide to get rid of algae. Attempt to avoid spraying your coral at all costs.

Algae can and will re-grow if left alone since peroxide won’t destroy the algae’s roots. The algae will be much reduced in size, making it much simpler to eradicate with less invasive methods.

This six-stage escalation will definitely solve your tank’s algae problem. Ideally, one of the more cautious early actions will be successful. Nevertheless, you now know a strategy that, when combined with excellent habits, can successfully prevent algae growth in your tank.

What can a shrimp die from?

In keeping with the idea of maintaining stability, avoid making abrupt, significant water changes. Smaller, more frequent water changes are considerably preferable to larger ones. The aquarium should be filled with the fresh water gradually. If you perform a large water change too rapidly, you risk shocking the shrimp into molting before they should, making them more vulnerable and increasing the likelihood that they will perish.

Will snails be killed by hydrogen peroxide?

You can check out How to Quarantine New Aquarium Plants for a more in-depth read. In conclusion, when working with live aquatic plants, these snails are a natural component of the environment and partly unavoidable.

You must sanitize any new plants you receive for your aquarium in a dip (e.g. bleach, hydrogen peroxide, alum). Any snails and their eggs will perish in this dip. Additionally, it ought to rid the plants of any parasites, illness, or algae. After sterilization, put them in a water container with a led light source so they can continue to grow. For around 3 weeks, keep an eye on the plants to make sure no snails emerge.

Why do cherry shrimp die?

Right now, red cherry shrimp are wildly popular, and it is simple to understand why. In a manner that fish don’t seem to, they give the aquarium life and personality. Due to its current popularity, several people are even keeping special Red Cherry Shrimp tanks.

Red Cherry Shrimp are incredibly durable, yet it can be very frustrating when they seem to be dying for no apparent reason. In this piece, I examine the most frequent causes of Red Cherry Shrimp death and offer suggestions for how to stop it.

Poor water quality, high levels of ammonia, nitrites, and nitrates, or the presence of a pollutant like chlorine in the water are the most frequent causes of Red Cherry Shrimp deaths. The fact that Red Cherry Shrimp have been put to an immature tank without the algae and biofilm they prefer to eat may also be contributing to their demise.

Does all algae get killed by hydrogen peroxide?

The 3% solution is what we advise using with the Sochting Oxydator. Make sure the hydrogen peroxide solution you use contains no more than 3% hydrogen peroxide (H2O2). Other percentages will result in math errors and maybe an overdose that might cause serious harm. Green algae and blue-green algae are highly susceptible to the effects of hydrogen peroxide (cyanobacteria). It is heavier than water and sinks to the bottom, which is advantageous if the algae are close to the bottom of the tank but can be problematic if they are higher up.

To start, figure out how much 3% solution you’ll need to treat your aquarium once again. To do this, multiply the value of the aquarium volume by 5 after dividing the result by 30. The amount of fluid you’ll need for a single treatment, expressed in milliliters, is the outcome of this procedure. As an example, let’s use a tank with a volume of 120 liters: 120/30*5=20 ml. The amount of hydrogen peroxide in the aquarium water, measured in ppm or mg/l, is factor 5 in this equation.

As soon as the hydrogen peroxide is added, countless tiny air bubbles start to form in the treated areas. They are safe because they only contain pure oxygen.

Do helpful bacteria get killed by hydrogen peroxide?

Some farmers advocate using hydrogen peroxide to add oxygen to the root zone, prevent disease, and stop algae growth. However, hydrogen peroxide also kills all the helpful microorganisms, so you won’t receive any of their advantages. Therefore, if you are utilizing additional microorganisms like those in Tarantula and Voodoo Juice, we do not advise using hydrogen peroxide.

What kills shrimp in the most compassionate way?

  • Crushed ice should be added to an insulated container (such an esky) before water; for marine species, add salt water with a salinity (salt concentration) of sea water.
  • Make certain to:
  • the temperature will be around -1 degrees Celsius and the consistency will be similar to wet cement when ice and water (salt water for marine animals) are mixed in a 3:1 ratio.
  • There is enough ice on hand to keep things at the right temperature throughout chilling.
  • Crustaceans should be added to the ice slurry. Keep an eye out for any indications of insensibility in them (see “Signs of insensibility”). Species, animal size, and metabolic condition will all affect how long it takes to establish insensibility. It takes at least 20 minutes for many species.
  • As soon as the crabs begin to exhibit signs of insensibility, mechanically kill them as quickly as you can to prevent them from awakening.

How quickly does algae get killed by hydrogen peroxide?

While there are a number of techniques to spot-treat algae in an aquarium, 3% hydrogen peroxide is a preferred method (H2O2). Here is a brief explanation of how to use H202 to spot treat safely:

  • First, turn off your filters because keeping them on can harm your bacteria colony.
  • 3ml should be used for each gallon of water. Apply hydrogen peroxide to the affected regions as needed using a syringe filled with the solution. Alternately, you can totally empty your tank and treat the damaged regions with hydrogen peroxide after filling a spray bottle with it.
  • Don’t be concerned if you see bubbles appearing on the treated regions! This is typical and totally safe for your tank’s residents.
  • After treatment, keep your filters off for roughly 20 minutes.

Within 24 hours, the algae should start to disappear. There might be a color change. Until the algae is eliminated, this treatment may need to be repeated.

Does hydrogen peroxide work in aquariums?

We strongly advise treating the entire aquarium with hydrogen peroxide if it has tough green or blue-green algae, for instance (H2O2). When all other treatments have failed and you’re about to give up on your aquarium because you can’t get rid of the algae, then such a treatment should always be the last option. To avoid causing the creatures in your tank unnecessary stress, use a dosage that is both as high as necessary and as low as practical. In the course of this treatment, certain plants, such as Riccardia sp. (coral moss) and Riccia fluitans (liverwort), may suffer damage. Other aquatic plants may momentarily change color, but this is not always an indication that the plant is doomed.