How To Blanch Zucchini For Fish? Everything You Need To Know

As we all know, zucchini is one of the most popular foods for aquatic inhabitants.

It is a great option to feed bottom-dwellers, particularly species that are more of the grazing algae-eating kind because it is quick to cook, easy to use, and cheap.

Today, I will tell you how to blanch zucchini for fish for your snails, fish, and shrimp. You can do it with other vegetables, as long as they suit your fish.

How to Blanch Zucchini for Fish?

Step 1: Cleaning and Peeling


Cleaning and peeling are necessary to remove pesticides from the peel

Once you have prepared a zucchini, start cleaning it with tap water to remove potential contaminants and dirt. After that, you will need to peel it.

Many clips on YouTube or articles and posts online advise against peeling vegetables. In our opinion, that was a mistake.

You never know what chemicals have been put or added onto the peel when it was grown or preserved for stores. Your aquarium is one fragile ecosystem, and you should avoid putting it under more risks.

There were cases when aquatics bought zucchinis from the store and added them into their aquarium without peeling.

After that, their aquatic inhabitants had massive die-offs. Most likely, the reason is that they didn’t peel the zucchinis, which were treated with pesticides.

Even if your zucchinis have been grown without chemicals and are perfectly safe, peeling them won’t go wrong.

Peeling will allow you not to worry about what has been added to the peel and whether it is safe for your fish.

Moreover, peels are the last thing fish, shrimp, and snails eat. They sometimes even do not consume peels at all anyway.

You also need to remove zucchini seeds (whenever you can). The removal of seeds will not cause any problems.

Instead, you need to eliminate them as no individual eats them, and they can make a mess in the aquarium.

Step 2: Cutting

cut the zucchini into arbitrary pieces

You can cut the zucchini into arbitrary pieces

Once you have cleaned and peeled your zucchini, it is time to cut it into smaller pieces. This step does not matter what kind of slices or chunks you do.

We typically cut our zucchinis into medium slices (about 0.02 inches or 0.5 cm).

But some aquarists do thicker ones. So it is okay to do whatever you prefer for whatever you decide to feed your fish.

While cutting your zucchini, you should prepare boiling water. Boiling water while you clean and cut your zucchini will allow you to save precious time.

Step 3: Blanching

As soon as your water is boiling, you must add the pieces of zucchini into the boiled water to blanch them.

Remember that blanching your zucchini means that you will make them soften.

Thanks to that, it will be more effortless for your shrimp, snail, and fish to consume them.

Also, it will make these zucchini pieces sink to the bottom of your tank rather than float on the surface.

Remember that all vegetables, including zucchini, will lose their nutrients while immersed in the boiling water.

So preventing it and saving those nutrients for your fish is essential. We recommend keeping these pieces in the boiling water as little as you can.

The blanching process typically takes 1-3 minutes. Once your zucchini pieces start changing their color, it is a sign that they are ready. Then, you should soak these zucchini pieces in a bowl of cold water so they cool faster.

After blanching the zucchini, you need to put it in cold water. Once they are in cold water, they will start to sink to your bowl’s bottom. Then leave it there for one minute or two to cool completely.

Step 4: Drop Zucchini Pieces Into Your Aquarium

After the zucchini pieces have cooled, it’s time to add them to your aquarium.

An Alternative Variant of Blanching

If you don’t want to blanch in boiling water, it is okay to use the microwave. Microwaving for 15 to 30 seconds is okay to break your zucchini and can be quickly consumed.

Freezing and Keeping

If you don’t use up all the zucchini pieces, you can freeze them for later use. Here is how to do it:

Step 1: Prepare one sealed container to freeze zucchini pieces.

Step 2: Before putting these pieces into your container, we recommend letting the remaining water drop out.

Step 3: Store the container in the refrigerator or freezer.

Proper Usage

How many zucchini pieces you should feed your fish at a time will depend on many factors, including:

  • Number of fish in your aquarium.
  • How hungry is your fish?
  • What else do you feed them?


  • One time or two per week is more than enough.
  • Avoid putting too many chunks at once. Don’t overfeed them.
  • Remove uneaten chunks after 24 hours.


Do fish eat carrots?

Fish love carrots as they have a mild flavor which is ideal for any fish. Carrots are low in calories but high in beta-carotene, making them the perfect food.

What should you not feed fish?

Fat is harmful to various fish, so you should check the fat levels before preparing a diet for your fish.

Can fish eat bananas?


Most fish can eat bananas

Yes. Most fish can consume bananas and easily digest them. But you should avoid feeding bananas to carnivorous fish.

Final Thoughts

By now, you should know how to blanch zucchini for fish. In addition to zucchini, there are many other vegetable options for your fish, such as lima beans, cucumber, broccoli, lettuce, carrots, and cabbage. You can also apply this guide to them. Thank you for reading!