Mermaid Bath Bombs That Look AMAZING Two Ways!

These mermaid bath bombs look amazing, smell amazing, and can be made two ways. We’re sharing all the details on making them a fun addition to a bath or shower.

If you have a mermaid party or birthday party coming up, whip up a batch of these bath bombs in different sizes and it will be a crowd pleasing party favor!

Very colorful bath bombs in teal, purple, and pink topped with cupcake sprinkles with text which says mermaid party bath bomb recipe.
Learn how to make mermaid bath bombs – they’re easy, safe, and fun!

DIY Bath Bombs or Mermaid Shower Fizzies 

Here at Ruffles and Rain Boots, I am a HUGE fan of making my own bath products. From bath bombs to shower fizzies, I keep our DIY bath products fully stocked in this house.

As I mentioned here in this article about the difference between bath bombs and shower fizzies, there are a few differences when you turn a bath bomb into a shower fizzy. Read that article if you want to alter these to become mermaid shower fizzies or shower bombs. Psst: they are super easy.

Below, I’ll share two show-stopping and creative bath bombs for mermaid fans.

Horizontal image of two colorful bath bombs with text which reads mermaid bath bombs two ways.
Learn how to make your own mermaid bath bombs two ways!

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All Mermaid Bath Bombs and Shower Fizzies

Before we get started, you might want to check out all of my mermaid bath bombs and sugar scrubs here. There are Ariel-themed bath bombs, layered scrubs, and so much more.

collage of mermaid bath bomb recipes and mermaid sugar scrub tutorials in squares
Mermaid bath bombs and scrubs are easy, colorful, and safe to make on your own.

RELATED: Mermaid Sugar Scrub Cubes – You have to see these!

The Best Bath Bomb Mold

As mentioned above, I love making my own bath products. Grab a mixing bowl, 3 small bowls, a sifter or whisk, and a set of bath bomb molds. Below, I’ll share the measurements and supplies but first, let’s talk about molds.

What mold should I use for bath bombs?” is a question I get a lot here. My answer is, there are a TON of bath bomb molds but I feel the best are stainless steel molds. Stainless steel bath bomb molds are:

  • inexpensive (these are the ones I got on Amazon and I’ve been using them for years)
  • easy to form
  • they hold the shape of the bath bomb so well
  • and MOST IMPORTANT: these bath bomb molds are easy to un-mold and get the bath bombs out

Mermaid Tail Bath Bomb Mold

Another type of mermaid bath bomb mold I use is the mermaid tail. Now, if you’re new to making bath bombs, silicone molds are… tricky but plentiful. Often, the inexpensive tail molds will be harder to pack and hold their shape. That said, I’ve use them successfully.

Tips for using silicone mermaid tail molds: pack them very, very tightly. Also, don’t try to fill the entire mold (if using a thin silicone mold with 8 tails, for example). Finally, let the bath bombs dry completely (at least 2 days) in the mold itself and do not move them while they are drying.

If you really want to make a professional look that is easy to use, this exceptional mermaid tail bath bomb mold is the best. There is absolutely nothing else like it on the market.

How To Get a Perfectly Round Bath Bomb

Okay, one last thing I’ll mention before you start… If you’re using a traditional bath bomb mold (circle) and you want a perfectly round fizzy, do not unmold them and put them on a tray.

Instead, spread out a kitchen towel over a muffin tin so that the bath fizzies are sort of hanging over the openings. Be sure to flip them around to let all areas dry.

Black and white horizontal image of mermaid bath bomb supplies on wood table.

Make it a Set with Mermaid Sugar Scrub Cubes

I whipped up this easy mermaid sugar scrub you might like to pair with these bath bombs. This would make a great gift set – they are color-coordinating and you can make the same scents or use others to mix it up.

They are really, really, really easy to make, friends. And it’s a perfect way to use up some leftover ingredients.

Vertical image showing layered mermaid solid sugar scrub cubes in a glass shell dish.

How to Make Mermaid Bath Bombs

Below is the written and printable tutorial for these bath bombs. I’ve been making them for years so if you have any questions, please use the comment section below.

Yield: 5

Mermaid Bath Bombs That Look AMAZING Two Ways!

Mermaid Bath Bombs

These mermaid bath bombs look amazing, smell amazing, and can be made two ways.

Prep Time 5 minutes
Active Time 15 minutes
Total Time 20 minutes
Difficulty Easy
Estimated Cost $3


  • 1 cup baking soda (sodium bicarbonate)
  • 1/2 cup citric acid (we buy ours in bulk from Amazon, it’s MUCH more cost-effective)
  • 1/4 cup cream of tartar
  • 2 tablespoons melted coconut oil or castor oil
  • 2 tablespoons rubbing alcohol (or Witch Hazel)
  • 10-20 drops EACH orange, grapefruit, lime, & tangerine essential oils (or your favorites)
  • pink, purple, and blue (or teal) mica powder (or soap colorant)
  • mermaid sprinkles (these will dissolve in the bath water)


  • mixing bowl
  • 3 small bowls
  • a sifter or whisk
  • a set of bath bomb molds


  1. In a large bowl, mix together the baking soda, citric acid, and cream of tartar. Whisk or sift the mixture together, removing any clumps.
  2. Add the essential oils you’ve chosen and stir to combine. Add the coconut oil and 2 tablespoons of rubbing alcohol and stir slowly.
  3. Slowly add these wet ingredients into the large bowl with the dry ingredients, about 1 tablespoon at a time to avoid activating the dry mix. The mix is ready when you can squish it together in your palm, drop it into bowl, and it doesn’t come apart. It should feel like moist sand.
  4. Separate the mix into three bowls. Add mica powder to each bowl to color the mixes and blend it together with your hands. Use gloves if you have sensitive skin and remove all rings.
  5. If making the sprinkle version of these mermaid bath bombs, load sprinkles into the bottom of a bath bomb mold half. Layer the colors and press down. Repeat with the other half of the mold, but exclude the sprinkles and overpack it slightly (a mound). You might need to spritz your mix with the spray bottle if it got a bit dry while you were mixing.
  6. Press the mold together tightly. Lightly twist to get the mold compressed. Gently tap the mold to release one side and then the other. Use the muffin tin and kitchen towel to let them dry overnight or 36 hours if heat-shrinking.
  7. Mermaid Bath Bombs

Did you make this?

Please leave a comment or share a photo and tag me @rufflesandrain

Six image collage showing how to make mermaid bath bombs using pantry ingredients.

Alternate Way to Make and Gift Mermaid Bath Bombs

If you are gifting these fun bath bombs for kids, you can leave off the sprinkles. That way, they won’t be tempted to put them in their mouths.

Additionally, when I make bath bombs for my daughter who has sensitive skin, I leave off the SLSA called for in some recipes. It’s just a personal choice. If you’re not familiar with SLSA, it’s an additive that helps give more fizzy bubbles to the bath bombs and it is 100% optional. Either way, these mermaid bath bombs are absolutely stunning without the sprinkles.

A close up image of a subdued, non-decorated mermaid bath bomb recipe showing the multiple colors used shown on a white wood background.

RELATED READING: Easy DIY Milk Bath Bomb Recipe for Luxurious Relaxation

How to Make Mermaid Shower Bombs and Shower Fizzies

If you’re going to make these into shower bombs, it’s easy. Leave off the SLSA (if you have it) and put the mixture into a mold with a flat side.

All of our recipes can be made into aromatherapy shower bombs easily. Unlike shower melts, these will last for a while and release a powerful punch of invigorating and energizing scents.

Please Save or Share This

Your shares are how this site grows and I am sincerely grateful. Please save this to a DIY bath bombs recipe pin board or share it to a crafty, fun Facebook group.

Vertical image of a close up of three bath bombs with a colorful mermaid theme and text which reads mermaid party bath bomb recipe.

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