FREE HYPNEA & FREE SAWBLADE ALGAE !

FREE Hypnea

FREE Red Sawblade Algae

On orders $100+ (pre-shipping price) !

Offer automatically applied at time of shipment.

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Bored of the average reef aquarium?

MosaicMacros offers a wide range of exotic marine macroalgae & plants 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.

New Species!

Best Sellers

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Shop by Phylum

Rhodophyta (Red Algae)

Rhodophyta, commonly known as red algae, make beautiful additions to any aquarium.... 

Rhodophyta (Red Algae)

Chlorophyta (Green Algae)

Green algae often grow prolifically, adding a very naturalistic vegetative look to... 

Chlorophyta (Green Algae)

Phaeophyta (Brown Algae)

Brown algae are seldom seen in the hobby due to most being... 

Phaeophyta (Brown Algae)

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

Shop By Genus: Caulerpa

Restriction on Shipping: Caulerpa species are BANNED in the state of California. We are absolutely unable to send any member of the genus into the state, and any order placed within California with any member of the genus will be cancelled and refunded.

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Shop By Genus: Gracilaria

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More Categories

  • Rhodophyta

    Rhodophyta are commonly referred to as red algae. These species take on reds, purples, blues, and some are even iridescent in nature.

  • Chlorophyta

    Chlorophyta, or green algae, are some of the most prolifically growing algae species. Members of the Codium and Caulerpa genus are within this category.

  • Phaeophyta

    Phaeophyta are usually cold water in nature, though some tropical species are kept in aquariums. Sargassum and Padina are the two main genus that find their way into home aquaria.

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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