Macroalgae for Seahorses

Macroalgae for Seahorses

There are 33 products.

Macroalgae for the Seahorse Aquarium

Welcome to the beautiful world of marine macro algae for the Display Tank & Refugium
Your 1st choice for Sustainable Grown Macroalgae Species in the UK since 2014

Do you like the idea of watching your Seahorse holding onto natural live macroalgae like they would do in the Sea in your very own Seahorse Aquari...

Macroalgae for the Seahorse Aquarium

Welcome to the beautiful world of marine macro algae for the Display Tank & Refugium
Your 1st choice for Sustainable Grown Macroalgae Species in the UK since 2014

Do you like the idea of watching your Seahorse holding onto natural live macroalgae like they would do in the Sea in your very own Seahorse Aquarium?

With more than 40 different seahorse species worldwide the possibility to keep seahorses in a home aquarium became over the last years more and more popular.
Much more tank breed Seahorse species are widely available within the UK and nowadays the knowledge about how to keep them successfully in a marine aquarium is much more advanced than ever before.

Still, there are a lot of rumours about using marine macro algae for a Seahorse Aquarium, which we would like to explain more specifically and with that hopefully, make it more understandable why some macroalgae species are actually very beneficial for the comfort and health of your Seahorses.

While setting up a seahorse aquarium, it is important that certain things regarding water flow, the oxygen level and the fitting environment are thoughtfully considered, to care about them in the best way possible and to keep them happy and healthy.

As Seahorses will find comfort when they can hold themselves onto something, the presence of live macroalgae in the seahorse aquarium will add in a natural way those beneficial holdfasts for them. Surely you can reach this with artificial plants ar plastic holds fast too.

But can this really compete with the beauty of natural living plants in your aquarium?  
Having gracile Seahorses full of personality in a beautiful natural looking marine aquarium isn't this answering this question by itself?

Yes, we are mad about macro algae! But the reason for this is that we know about all the benefits which comes with the use of macroalgae in the marine aquarium. And we received from our happy customers so many nice feedbacks and pictures of Seahorses holding onto their new live macroalgae, which made us even more proud and confident to recommend you the perfect macro algae for your seahorse tank setup too.

The following marine macroalgae / seaweed species have been proven as very suitable for a seahorse aquarium, as they provide the natural holdfast which Seahorses are looking for. 

Some of the marine algae species might grow a bit faster, so please feel free to contact us before you place an order, to find the best marine algae for your seahorse aquarium.

All the macroalgae we sell are from our special Algae Tanks setups which are kept without any fishes for a disease-free and premium quality. This said, they might come with hitchhikers not limited to Copepods and Rotifers, as those beneficial critters love the protected environment of our planted marine tanks.  

Beside of the natural holdfast, marine macroalgae will provide you as well all the other great benefits, like cleaning the water by reducing not just Nitrate and Phosphate from the water, and much more which we explain more in our FAQ part about macroalgae

Showing 1 - 24 of 33 items
  • Acanthophora Spicifera

    The Acanthophora Spicifera marine macroalgae has irregular stiff uprights, which are quite fragile and it will grow like little shrubs, creating an area which will provide a hiding space for small critters and fishes and a natural holdfast for seahorses. It belongs to the red algae species although its colour ranges more between brown/reddish/grey...

    £ 7.95
    0 1 2 3 4 11 Review(s) 
  • Gracilaria Tikvahiae - Mocha Ogo Red Marine Macroalgae Gracilaria Tikvahiae - Mocha Ogo Red Marine Macroalgae
    Product available with different options
    Gracilaria Tikvahiae - Mocha Ogo

    Gracilaria Tikvahiae - Mocha Ogo is a great algae for every marine aquarium, especially when it inhabits herbivore Fish & Seahorses. This macroalgae grows faster than most other Gracilaria species and offers not just a beautiful look,colour and structure but also a great food source for Tang, Foxface and co. plus natural holdfast for Seahorses.

    £ 7.95
    0 1 2 3 4 0 Review(s) 
  • Bryothamnion Triquetrum

    Bryothamnion Triquetrum is a beautiful but rare to find slow growing marine macroalgae which is non-invasive and grows in up to 15-20 cm long stiff branches with short stalks. It is a great choice for the display Tank and Seahorse Tank where it adds natural holdfast for Seahorses. The colouration of this macro algae species will vary depending on the...

    £ 9.95
    0 1 2 3 4 0 Review(s) 
  • Codium

    The Codium macroalgae is a true all-rounder for the marine aquarium. Not fuzzy regards the light or current and very beautiful looking. Codium has a great dark main structure, which develops irregularly into cylindrical branches. Along its branches it develops soft fuzzy filaments which a lot of fishes love to eat. A perfect macroalgae for Seahorses too,...

    £ 6.95
    0 1 2 3 4 16 Review(s) 
  • Cladophora Prolifera - Green Bush

    Cladophora Prolifera macroalgae is a fantastic addition for every display & Seahorse tank as it is a non-invasive & very compact growing algae, forming small irregular shaped clumps. It adds a beautiful bright green colour to the aquarium and provides hiding space for copepods and rotifers, allowing them to increase in population and in turn creating a...

    £ 6.95
    0 1 2 3 4 1 Review(s) 
  • Caulerpa Prolifera

    Caulerpa Prolifera is a beautiful macroalgae species, offering long blades which can grow up to 20-30 cm long.The fronds are attached to a thick rhizome which will attach itself to rock which means it will need to be restricted in the tank. Caulerpa Prolifera will add a great natural look to the marine tank. This algae can adapt better to various water...

    £ 6.95
    0 1 2 3 4 11 Review(s) 
  • Gracilaria Vermiculophylla

    The Gracilaria Vermiculophylla is a truly beautiful macroalgae species. It is a striking red algae species and will be a perfect addition to any reef display tank and Seahorse aquarium as it is a non-invasive algae which offers additional natural holdfasts too. It features long red branches which will become more dense in stronger light.

    £ 9.95
    0 1 2 3 4 8 Review(s) 
  • The Seahorse Trust - Donation

    Livealgae UK supports the great work the Seahorse Trust is providing and your extra donation will help the Seahorse Trust in their passionate work protecting the Seahorse Wildlife in the UK. 

    £ 1.00
    0 1 2 3 4 0 Review(s) 
  • Caulerpa Racemosa Cylindracea

    Caulerpa Racemosa Cylindracea is a very fast growing and beautiful looking marine macroalgae, which will give your tank a more natural look and adds a natural holdfast for Seahorses. This caulerpa macro algae is a great choice for the nutrients export, e.g. to reduce the Nitrate and Phosphate level in the tank, as it is quite a fast growing macroalgae...

    £ 6.95
    0 1 2 3 4 9 Review(s) 
  • Caulerpa Taxifolia

    The Caulerpa Taxifolia macroalgae has long fronds with segmented appendages which can reach up to 20-30cm in length. This marine algae is tolerant to a wide range of water temperatures but will need more light than for example Caulerpa Prolifera. This is a very nice looking macro algae which gives the marine tank a beautiful natural look.

    £ 6.95
    0 1 2 3 4 14 Review(s) 
  • Halymenia Maculata

    The Halymenia Maculata macroalgae or often referred to as Leafy Sphere Ogo is a very popular algae for the marine aquarium as it looks just beautifully in a Reef Display Tank.The beautiful more stiff like blades will vary in a colouration between purple over light red to deep red (most often) depending on what light is provided.

    £ 7.95
    0 1 2 3 4 0 Review(s) 
  • Halymenia sp. Dragon’s Tongue

    Halymenia sp. Dragon’s Tongue is a very popular macro alga in the marine aquarium as it is a great alga for the Tank Display. Beautiful looking, slow growing and non-invasive.The body of the macro algae is a deep red, while the new growth tips are more orange A similar macroalgae to this is the beautiful Halymenia Maculata

    £ 9.95
    0 1 2 3 4 10 Review(s) 
  • Gracilaria Curtissae

    The Gracilaria Curtissae macroalgae is beautiful red marine algae species. It features deep red branches which will form a symmetrical bush. Gracilaria species are slow growing and need a long time to attach themself.A great macroalgae for the Display Tank, where it will surely become fast a highlight and it might compete when it comes to the beauty of it...

    £ 7.95
    0 1 2 3 4 17 Review(s) 
  • Nemastoma Sp

    The Nemastoma Sp aka Red Finger marine macroalgae is a not a very common marine macro algae species, as it is very rarely available. It features red irregular branches and will form rather small clumps. It is very slow growing and will be a beautiful addition to the marine tank display and perfect for Seahorses as it provides natural holdfasts.

    £ 7.95
    0 1 2 3 4 0 Review(s) 
  • Gracilaria Tikvahiae - Green Ogo

    Gracilaria Tikvahiae - Green Ogo adds a bright to dark green colour to the marine aquarium and grows in small bush like patterns. It is a beautiful macroalgae for the Display Tank & Refugium. This macroalgae grows faster than most other Gracilaria species and offers not just a beautiful look and colour but also is a great food source for herbivore...

    £ 7.95
    0 1 2 3 4 0 Review(s) 
  • Botryocladia - Red Grape

    The Botryocladia - Red Grape macroalgae is with its vibrant deep red coloured grapes an eye catcher in the marine reef tank and in high demand. It is a non-invasive, beautiful looking algae which will look amazing in any marine aquarium, as a medium fast growing algae species it is perfect for Nano-Tank, Reef-Tank and for the Seahorse Tank, as it will...

    £ 6.95
    0 1 2 3 4 22 Review(s) 
  • Ochtodes Sp.

    The marine macroalgae Blue Ochtodes sp. with its purple/blue colour is a fantastic addition to the marine tank. It will add a beautiful and rare to find colour to the tank and will quickly become a centerpiece. It has a dense structure which offers great hiding space for beneficial hitchhikers like copepods, rotifers and thus will be a nice hunting place...

    £ 7.95
    0 1 2 3 4 29 Review(s) 
  • Cryptonemia Crenulata

    Cryptonemia Crenulata is a very rare to find macroalgae, which is a shame as it is with its thick branches and its deep red colour a real eye catcher in the display tank. This macroalgae is non-invasive and grows quite slow, which makes it a great addition for Nano-Tanks, Seahorse Tanks and planted reef tanks.

    £ 7.95
    0 1 2 3 4 12 Review(s) 
  • Halimeda Incrassata

    Halimeda Incrassata is a beautiful medium fast growing green macroalgae which is non-invasive and calcified, which means it needs good calcium levels in the tank to thrive. This beautiful marine algae has stiff, segmented flat shaped fronds which can grow up to 30 cm. and this algae does best when placed in the marine aquarium substrate where it will be...

    £ 9.95
    0 1 2 3 4 7 Review(s) 
  • Caulerpa Racemosa Grape Caulerpa

    The Caulerpa Racemosa Grape Caulerpa marine macroalgae is a very popular and beautiful looking macro algae species, which often get seen as the origin of Caulerpa racemosa species. It is fast growing and forms ball shaped appendages, therefore it is commonly called Grape Caulerpa. In the planted reef tank we recommend to keep it away from the main...

    £ 6.95
    0 1 2 3 4 5 Review(s) 
  • Caulerpa Serrulata

    The Caulerpa Serrulata marine macroalgae species has small branched uprights with a series of flat serrated blades. It is a great alternative to some other Caulerpa species which can go sexual as it is a very hardie caulerpa marine algae . A great choice for the nutrients export.

    £ 5.95
    0 1 2 3 4 6 Review(s) 
  • Caulerpa Sertulariodes

    Caulerpa Sertulariodes is a very beautiful macroalgae which develops upright feather or fern looking blades, which canreach a high up to 20cm. It can be sometimes mistaken as Caulerpa Taxifolia but it looks more filigrain. It grows well in the substrate but prefers more hard surfaces to attach to.

    £ 6.95
    0 1 2 3 4 0 Review(s) 
  • Refugium Nitrate & Phosphate Remover Algae-Pack

    This macroalgae pack is a great choice if you are looking for fast growing marine algae to lower the Nitrate & Phosphate levels in the marine aquarium.  They are smaller algae frags than the single sold algae species but a great choice if you don't want to spend a lot of money. You will get 4 different macroalgae as starter algae frags.  Perfect for the...

    £ 12.95
    0 1 2 3 4 28 Review(s) 
  • Duo Caulerpa Starter Set

    With this algae set you will receive 2 fast growing and great looking marine macroalgae species together.  This marine macro algae pack is a great choice for you when you just started to enrich your marine tank with macroalgae and you don't want to spend a lot of money.  

    £ 7.95
    0 1 2 3 4 10 Review(s) 

Frequently Asked Questions

What macroalgae do you recommend for the Display Tank?

There are a lot of beautiful macroalgae species which are just perfect to be placed in the Refugium Display Tank & even for a Seahorse Tank.

We can especially recommend non-invasive macroalgae species which will add a beautiful colour and structure to the marine aquarium to enjoy.

Macroalgae for the Display Tank

How to achieve better macroalgae growth?

Macroalgae don't need a lot to grow, just good lighting and enough nutrients.

Should you already have good lighting for your macroalgae but the growth is not as it should be, maybe there are some nutrients missing in your aquarium water which it need to grow?

Find more here about what water conditions are optimal for macroalgae and dosing nutrients to your reef tank/refugium.


Clean Macroalgae - Sustainable grown in the UK

Livealgae UK offers you premium macroalgae species from fish & copper free tanks. 

All macroalgae we sell are sustainable grown in the UK and will be dipped and manually inspected before getting posted out to you, to ensure a premium clean macroalgae quality as much as possible.

Satisfaction Guarantee

We want you to be fully happy with your new additions and offer you a hassle free 100% Satisfaction & Alive Arrival Guarantee. 

If you are not fully happy with your purchase on arrival we will refund your money back (UK Orders only).

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GuaranteED Satisfaction

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