FREE RED ALGAE 4-PACK!

Limited Time Only!

Snag a FREE Red Algae 4-Pack in orders $100+

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*FREE ALGAE will not appear in your cart & is applied at the time of fulfillment.

*Eligibility for free algae is in accordance with order total BEFORE shipping price.

*Limit of one free algae product per order in accordance with order threshold.

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Dive in

Ever dream of a saltwater planted aquarium?

MosaicMacros offers a wide range of exotic marine macroalgae for sale! Create a beautiful planted mosaic of seaweed in your aquarium with our macroalgae hailing from both the Atlantic and Indo-Pacific regions. We have the largest selection of macroalgae around!

Macroalgae provides a naturalistic scape for fish and a safe haven for small organisms - boosting your tanks biodiversity all while adding hiding places for fish and removing toxic compounds from aquarium water.

Whether you're interested in staple refugium macroalgae like Gracilaria, Caulerpa, Ogo, and Chaeomorpha, or stunning macroalgae like Hypnea or Botryocladia for the display, MosaicMacros has you covered!

New Species!

Best Sellers

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Rhodophyta - Red Algae

Rhodophyta, commonly known as red algae, make beautiful additions to any aquarium. Coming in many different shapes, sizes, and textures, these algae are sure to spruce up any marine system!
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Chlorophyta - Green Algae

Green algae often grow prolifically, adding a very naturalistic vegetative look to any aquarium.
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Phaeophyta - Brown Algae

Brown algae are seldom seen in the hobby due to most being cold water species. These algae are often harder to care for than red or green species.
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Got Hair Algae?

Give some of our snails a try! Not only are they great hair algae eaters, they'll even clean your larger macroalgae.

Marine Snails

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Questions, Comments, Concerns?

Contact us!

Customer service is our top priority here at MosaicMacros (outside of quality algae, of course.) If you have any questions regarding algae, issues with an order, or just want to discuss seaweeds, shoot us a message! We're always here to help :)

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